/**
 * MaNGOS is a full featured server for World of Warcraft, supporting
 * the following clients: 1.12.x, 2.4.3, 3.3.5a, 4.3.4a and 5.4.8
 *
 * Copyright (C) 2005-2021 MaNGOS <https://getmangos.eu>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * World of Warcraft, and all World of Warcraft or Warcraft art, images,
 * and lore are copyrighted by Blizzard Entertainment, Inc.
 */

#include "SpellMgr.h"
#include "ObjectMgr.h"
#include "SpellAuraDefines.h"
#include "ProgressBar.h"
#include "DBCStores.h"
#include "SQLStorages.h"
#include "Chat.h"
#include "Spell.h"
#include "Unit.h"
#include "World.h"

bool IsPrimaryProfessionSkill(uint32 skill)
{
    SkillLineEntry const* pSkill = sSkillLineStore.LookupEntry(skill);
    if (!pSkill)
    {
        return false;
    }

    if (pSkill->categoryId != SKILL_CATEGORY_PROFESSION)
    {
        return false;
    }

    return true;
}

SpellMgr::SpellMgr()
{
}

SpellMgr::~SpellMgr()
{
}

SpellMgr& SpellMgr::Instance()
{
    static SpellMgr spellMgr;
    return spellMgr;
}

int32 GetSpellDuration(SpellEntry const* spellInfo)
{
    if (!spellInfo)
    {
        return 0;
    }
    SpellDurationEntry const* du = sSpellDurationStore.LookupEntry(spellInfo->DurationIndex);
    if (!du)
    {
        return 0;
    }
    return (du->Duration[0] == -1) ? -1 : abs(du->Duration[0]);
}

int32 GetSpellMaxDuration(SpellEntry const* spellInfo)
{
    if (!spellInfo)
    {
        return 0;
    }
    SpellDurationEntry const* du = sSpellDurationStore.LookupEntry(spellInfo->DurationIndex);
    if (!du)
    {
        return 0;
    }
    return (du->Duration[2] == -1) ? -1 : abs(du->Duration[2]);
}

int32 CalculateSpellDuration(SpellEntry const* spellInfo, Unit const* caster)
{
    int32 duration = GetSpellDuration(spellInfo);

    if (duration != -1 && caster)
    {
        int32 maxduration = GetSpellMaxDuration(spellInfo);

        if (duration != maxduration && caster->GetTypeId() == TYPEID_PLAYER)
        {
            duration += int32((maxduration - duration) * ((Player*)caster)->GetComboPoints() / 5);
        }

        if (Player* modOwner = caster->GetSpellModOwner())
        {
            modOwner->ApplySpellMod(spellInfo->Id, SPELLMOD_DURATION, duration);

            if (duration < 0)
            {
                duration = 0;
            }
        }
    }

    return duration;
}

uint32 GetSpellCastTime(SpellEntry const* spellInfo, Spell const* spell)
{
    if (spell)
    {
        // some triggered spells have data only usable for client
        // any triggered spell should be an instant cast
        if (spell->IsTriggeredSpellWithRedundentCastTime())
        {
            return 0;
        }

        // spell targeted to non-trading trade slot item instant at trade success apply
        if (spell->GetCaster()->GetTypeId() == TYPEID_PLAYER)
            if (TradeData* my_trade = ((Player*)(spell->GetCaster()))->GetTradeData())
                if (Item* nonTrade = my_trade->GetTraderData()->GetItem(TRADE_SLOT_NONTRADED))
                    if (nonTrade == spell->m_targets.getItemTarget())
                    {
                        return 0;
                    }
    }

    SpellCastTimesEntry const* spellCastTimeEntry = sSpellCastTimesStore.LookupEntry(spellInfo->CastingTimeIndex);

    // not all spells have cast time index and this is all is pasiive abilities
    if (!spellCastTimeEntry)
    {
        return 0;
    }

    int32 castTime = spellCastTimeEntry->CastTime;

    if (spell)
    {
        if (Player* modOwner = spell->GetCaster()->GetSpellModOwner())
        {
            modOwner->ApplySpellMod(spellInfo->Id, SPELLMOD_CASTING_TIME, castTime, spell);
        }

        if (!spellInfo->HasAttribute(SPELL_ATTR_ABILITY) && !spellInfo->HasAttribute(SPELL_ATTR_TRADESPELL))
        {
            castTime = int32(castTime * spell->GetCaster()->GetFloatValue(UNIT_MOD_CAST_SPEED));
        }
        else
        {
            if (spell->IsRangedSpell() && !spell->IsAutoRepeat())
            {
                castTime = int32(castTime * spell->GetCaster()->m_modAttackSpeedPct[RANGED_ATTACK]);
            }
        }
    }

    if (spellInfo->HasAttribute(SPELL_ATTR_RANGED) && (!spell || !spell->IsAutoRepeat()))
    {
        castTime += 500;
    }

    // [workaround] holy light (spell 19968) has a 2.5 sec cast time in DBC but it should be an instant cast.
    // TODO: Once DBC's are moved to the database, a hotfix can be applied directly to the db and this code removed
    if (spellInfo->Id == 19968)
    {
        castTime = 0;
    }
    return (castTime > 0) ? uint32(castTime) : 0;
}

uint32 GetSpellCastTimeForBonus(SpellEntry const* spellProto, DamageEffectType damagetype)
{
    uint32 CastingTime = !IsChanneledSpell(spellProto) ? GetSpellCastTime(spellProto) : GetSpellDuration(spellProto);

    if (CastingTime > 7000)
    {
        CastingTime = 7000;
    }
    if (CastingTime < 1500)
    {
        CastingTime = 1500;
    }

    if (damagetype == DOT && !IsChanneledSpell(spellProto))
    {
        CastingTime = 3500;
    }

    int32 overTime    = 0;
    uint8 effects     = 0;
    bool DirectDamage = false;
    bool AreaEffect   = false;

    for (uint32 i = 0; i < MAX_EFFECT_INDEX; ++i)
        if (IsAreaEffectTarget(Targets(spellProto->EffectImplicitTargetA[i])) || IsAreaEffectTarget(Targets(spellProto->EffectImplicitTargetB[i])))
        {
            AreaEffect = true;
        }

    for (uint32 i = 0; i < MAX_EFFECT_INDEX; ++i)
    {
        switch (spellProto->Effect[i])
        {
            case SPELL_EFFECT_SCHOOL_DAMAGE:
            case SPELL_EFFECT_POWER_DRAIN:
            case SPELL_EFFECT_HEALTH_LEECH:
            case SPELL_EFFECT_ENVIRONMENTAL_DAMAGE:
            case SPELL_EFFECT_POWER_BURN:
            case SPELL_EFFECT_HEAL:
                DirectDamage = true;
                break;
            case SPELL_EFFECT_APPLY_AURA:
                switch (spellProto->EffectApplyAuraName[i])
                {
                    case SPELL_AURA_PERIODIC_DAMAGE:
                    case SPELL_AURA_PERIODIC_HEAL:
                    case SPELL_AURA_PERIODIC_LEECH:
                        if (GetSpellDuration(spellProto))
                        {
                            overTime = GetSpellDuration(spellProto);
                        }
                        break;
                        // Penalty for additional effects
                    case SPELL_AURA_DUMMY:
                        ++effects;
                        break;
                    case SPELL_AURA_MOD_DECREASE_SPEED:
                        ++effects;
                        break;
                    case SPELL_AURA_MOD_CONFUSE:
                    case SPELL_AURA_MOD_STUN:
                    case SPELL_AURA_MOD_ROOT:
                        // -10% per effect
                        effects += 2;
                        break;
                    default:
                        break;
                }
                break;
            default:
                break;
        }
    }

    // Combined Spells with Both Over Time and Direct Damage
    if (overTime > 0 && CastingTime > 0 && DirectDamage)
    {
        // mainly for DoTs which are 3500 here otherwise
        uint32 OriginalCastTime = GetSpellCastTime(spellProto);
        if (OriginalCastTime > 7000)
        {
            OriginalCastTime = 7000;
        }
        if (OriginalCastTime < 1500)
        {
            OriginalCastTime = 1500;
        }
        // Portion to Over Time
        float PtOT = (overTime / 15000.0f) / ((overTime / 15000.0f) + (OriginalCastTime / 3500.0f));

        if (damagetype == DOT)
        {
            CastingTime = uint32(CastingTime * PtOT);
        }
        else if (PtOT < 1.0f)
        {
            CastingTime  = uint32(CastingTime * (1 - PtOT));
        }
        else
        {
            CastingTime = 0;
        }
    }

    // Area Effect Spells receive only half of bonus
    if (AreaEffect)
    {
        CastingTime /= 2;
    }

    // 50% for damage and healing spells for leech spells from damage bonus and 0% from healing
    for (int j = 0; j < MAX_EFFECT_INDEX; ++j)
    {
        if (spellProto->Effect[j] == SPELL_EFFECT_HEALTH_LEECH ||
            (spellProto->Effect[j] == SPELL_EFFECT_APPLY_AURA && spellProto->EffectApplyAuraName[j] == SPELL_AURA_PERIODIC_LEECH))
        {
            CastingTime /= 2;
            break;
        }
    }

    // -5% of total per any additional effect (multiplicative)
    for (int i = 0; i < effects; ++i)
    {
        CastingTime *= 0.95f;
    }

    return CastingTime;
}

uint16 GetSpellAuraMaxTicks(SpellEntry const* spellInfo)
{
    int32 DotDuration = GetSpellDuration(spellInfo);
    if (DotDuration == 0)
    {
        return 1;
    }

    // 200% limit
    if (DotDuration > 30000)
    {
        DotDuration = 30000;
    }

    for (int j = 0; j < MAX_EFFECT_INDEX; ++j)
    {
        if (spellInfo->Effect[j] == SPELL_EFFECT_APPLY_AURA && (
                spellInfo->EffectApplyAuraName[j] == SPELL_AURA_PERIODIC_DAMAGE ||
                spellInfo->EffectApplyAuraName[j] == SPELL_AURA_PERIODIC_HEAL ||
                spellInfo->EffectApplyAuraName[j] == SPELL_AURA_PERIODIC_LEECH))
        {
            if (spellInfo->EffectAmplitude[j] != 0)
            {
                return DotDuration / spellInfo->EffectAmplitude[j];
            }
            break;
        }
    }

    return 6;
}

uint16 GetSpellAuraMaxTicks(uint32 spellId)
{
    SpellEntry const* spellInfo = sSpellStore.LookupEntry(spellId);
    if (!spellInfo)
    {
        sLog.outError("GetSpellAuraMaxTicks: Spell %u not exist!", spellId);
        return 1;
    }

    return GetSpellAuraMaxTicks(spellInfo);
}

float CalculateDefaultCoefficient(SpellEntry const* spellProto, DamageEffectType const damagetype)
{
    // Damage over Time spells bonus calculation
    float DotFactor = 1.0f;
    if (damagetype == DOT)
    {
        if (!IsChanneledSpell(spellProto))
        {
            DotFactor = GetSpellDuration(spellProto) / 15000.0f;
        }

        if (uint16 DotTicks = GetSpellAuraMaxTicks(spellProto))
        {
            DotFactor /= DotTicks;
        }
    }

    // Distribute Damage over multiple effects, reduce by AoE
    float coeff = GetSpellCastTimeForBonus(spellProto, damagetype) / 3500.0f;

    return coeff * DotFactor;
}

WeaponAttackType GetWeaponAttackType(SpellEntry const* spellInfo)
{
    if (!spellInfo)
    {
        return BASE_ATTACK;
    }

    switch (spellInfo->DmgClass)
    {
        case SPELL_DAMAGE_CLASS_MELEE:
        {
            if (spellInfo->HasAttribute(SPELL_ATTR_EX3_REQ_OFFHAND))
            {
                return OFF_ATTACK;
            }
            return BASE_ATTACK;
        }
        case SPELL_DAMAGE_CLASS_RANGED:
            return RANGED_ATTACK;
        default:
        {
            // Wands
            if (spellInfo->HasAttribute(SPELL_ATTR_EX2_AUTOREPEAT_FLAG))
            {
                return RANGED_ATTACK;
            }
            return BASE_ATTACK;
        }
    }
}

bool IsPassiveSpell(uint32 spellId)
{
    SpellEntry const* spellInfo = sSpellStore.LookupEntry(spellId);
    if (!spellInfo)
    {
        return false;
    }
    return IsPassiveSpell(spellInfo);
}

bool IsPassiveSpell(SpellEntry const* spellInfo)
{
    return spellInfo->HasAttribute(SPELL_ATTR_PASSIVE);
}

bool IsNoStackAuraDueToAura(uint32 spellId_1, uint32 spellId_2)
{
    SpellEntry const* spellInfo_1 = sSpellStore.LookupEntry(spellId_1);
    SpellEntry const* spellInfo_2 = sSpellStore.LookupEntry(spellId_2);
    if (!spellInfo_1 || !spellInfo_2)
    {
        return false;
    }
    if (spellInfo_1->Id == spellId_2)
    {
        return false;
    }

    // Mighty Rage Potion + Elixir of giants
    if((spellId_1 == 11405 && spellId_2 == 17528) || (spellId_1 == 17528 && spellId_2 == 11405)){
    {
        return false;
    }
    }

    for (int32 i = 0; i < MAX_EFFECT_INDEX; ++i)
    {
        for (int32 j = 0; j < MAX_EFFECT_INDEX; ++j)
        {
            if (spellInfo_1->Effect[i] == spellInfo_2->Effect[j]
                && spellInfo_1->EffectApplyAuraName[i] == spellInfo_2->EffectApplyAuraName[j]
                && spellInfo_1->EffectMiscValue[i] == spellInfo_2->EffectMiscValue[j]
                && spellInfo_1->EffectItemType[i] == spellInfo_2->EffectItemType[j]
                && (spellInfo_1->Effect[i] != 0 || spellInfo_1->EffectApplyAuraName[i] != 0 ||
                    spellInfo_1->EffectMiscValue[i] != 0 || spellInfo_1->EffectItemType[i] != 0))
                    {
                        return true;
                    }
        }
    }

    return false;
}

int32 CompareAuraRanks(uint32 spellId_1, uint32 spellId_2)
{
    SpellEntry const* spellInfo_1 = sSpellStore.LookupEntry(spellId_1);
    SpellEntry const* spellInfo_2 = sSpellStore.LookupEntry(spellId_2);
    if (!spellInfo_1 || !spellInfo_2)
    {
        return 0;
    }
    if (spellId_1 == spellId_2)
    {
        return 0;
    }

    for (int32 i = 0; i < MAX_EFFECT_INDEX; ++i)
    {
        if (spellInfo_1->Effect[i] != 0 && spellInfo_2->Effect[i] != 0 && spellInfo_1->Effect[i] == spellInfo_2->Effect[i])
        {
            int32 diff = spellInfo_1->EffectBasePoints[i] - spellInfo_2->EffectBasePoints[i];
            if (spellInfo_1->CalculateSimpleValue(SpellEffectIndex(i)) < 0 && spellInfo_2->CalculateSimpleValue(SpellEffectIndex(i)) < 0)
            {
                return -diff;
            }
            else
            {
                return diff;
            }
        }
    }
    return 0;
}

SpellSpecific GetSpellSpecific(uint32 spellId)
{
    SpellEntry const* spellInfo = sSpellStore.LookupEntry(spellId);
    if (!spellInfo)
    {
        return SPELL_NORMAL;
    }

    switch (spellInfo->SpellFamilyName)
    {
        case SPELLFAMILY_GENERIC:
        {
            // Aspect of the Beast
            if (spellInfo->Id == 13161)
            {
                return SPELL_ASPECT;
            }

            // Food / Drinks (mostly)
            if (spellInfo->AuraInterruptFlags & AURA_INTERRUPT_FLAG_NOT_SEATED)
            {
                bool food = false;
                bool drink = false;
                for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
                {
                    switch (spellInfo->EffectApplyAuraName[i])
                    {
                            // Food
                        case SPELL_AURA_MOD_REGEN:
                        case SPELL_AURA_OBS_MOD_HEALTH:
                            food = true;
                            break;
                            // Drink
                        case SPELL_AURA_MOD_POWER_REGEN:
                        case SPELL_AURA_OBS_MOD_MANA:
                            drink = true;
                            break;
                        default:
                            break;
                    }
                }

                if (food && drink)
                {
                    return SPELL_FOOD_AND_DRINK;
                }
                else if (food)
                {
                    return SPELL_FOOD;
                }
                else if (drink)
                {
                    return SPELL_DRINK;
                }
            }
            else
            {
                // Well Fed buffs (must be exclusive with Food / Drink replenishment effects, or else Well Fed will cause them to be removed)
                // SpellIcon 2560 is Spell 46687, does not have this flag
                if (spellInfo->HasAttribute(SPELL_ATTR_EX2_FOOD_BUFF))
                {
                    return SPELL_WELL_FED;
                }
            }
            break;
        }
        case SPELLFAMILY_MAGE:
        {
            // family flags 18(Molten), 25(Frost/Ice), 28(Mage)
            if (spellInfo->SpellFamilyFlags & UI64LIT(0x12000000))
            {
                return SPELL_MAGE_ARMOR;
            }

            if (spellInfo->EffectApplyAuraName[EFFECT_INDEX_0] == SPELL_AURA_MOD_CONFUSE && spellInfo->PreventionType == SPELL_PREVENTION_TYPE_SILENCE)
            {
                return SPELL_MAGE_POLYMORPH;
            }

            break;
        }
        case SPELLFAMILY_WARRIOR:
        {
            if (spellInfo->SpellFamilyFlags & UI64LIT(0x00008000010000))
            {
                return SPELL_POSITIVE_SHOUT;
            }

            break;
        }
        case SPELLFAMILY_WARLOCK:
        {
            // only warlock curses have this
            if (spellInfo->Dispel == DISPEL_CURSE)
            {
                return SPELL_CURSE;
            }
            break;
        }
        case SPELLFAMILY_PRIEST:
        {
            // "Well Fed" buff from Blessed Sunfruit, Blessed Sunfruit Juice, Alterac Spring Water
            if (spellInfo->HasAttribute(SPELL_ATTR_CASTABLE_WHILE_SITTING) &&
                (spellInfo->InterruptFlags & SPELL_INTERRUPT_FLAG_AUTOATTACK) &&
                (spellInfo->SpellIconID == 52 || spellInfo->SpellIconID == 79))
                {
                    return SPELL_WELL_FED;
                }
            break;
        }
        case SPELLFAMILY_HUNTER:
        {
            // only hunter stings have this
            if (spellInfo->Dispel == DISPEL_POISON)
            {
                return SPELL_STING;
            }

            // only hunter aspects have this (one have generic family), if exclude Auto Shot
            if (spellInfo->activeIconID == 122 && spellInfo->Id != 75)
            {
                return SPELL_ASPECT;
            }

            break;
        }
        case SPELLFAMILY_PALADIN:
        {
            if (IsSealSpell(spellInfo))
            {
                return SPELL_SEAL;
            }

            if (spellInfo->IsFitToFamilyMask(UI64LIT(0x0000000010000100)))
            {
                return SPELL_BLESSING;
            }

            if ((spellInfo->IsFitToFamilyMask(UI64LIT(0x0000000020180400))) && spellInfo->baseLevel != 0)
            {
                return SPELL_JUDGEMENT;
            }

            if (spellInfo->HasSpellEffect(SPELL_EFFECT_APPLY_AREA_AURA_PARTY))
                // only paladin auras have this
            {
                return SPELL_AURA;
            }
        }
        case SPELLFAMILY_SHAMAN:
        {
            if (IsElementalShield(spellInfo))
            {
                return SPELL_ELEMENTAL_SHIELD;
            }

            break;
        }

        case SPELLFAMILY_POTION:
            return sSpellMgr.GetSpellElixirSpecific(spellInfo->Id);
    }

    // only warlock armor/skin have this (in additional to family cases)
    if (spellInfo->SpellVisual == 130 && spellInfo->SpellIconID == 89)
    {
        return SPELL_WARLOCK_ARMOR;
    }

    // Tracking spells (exclude Well Fed, some other always allowed cases)
    if (IsSpellHaveAura(spellInfo, SPELL_AURA_TRACK_CREATURES) ||
        IsSpellHaveAura(spellInfo, SPELL_AURA_TRACK_STEALTHED) ||
        (IsSpellHaveAura(spellInfo, SPELL_AURA_TRACK_RESOURCES) && !spellInfo->HasAttribute(SPELL_ATTR_PASSIVE) && !spellInfo->HasAttribute(SPELL_ATTR_CANT_CANCEL)))
    {
        return SPELL_TRACKER;
    }

    // elixirs can have different families, but potion most ofc.
    if (SpellSpecific sp = sSpellMgr.GetSpellElixirSpecific(spellInfo->Id))
    {
        return sp;
    }

    return SPELL_NORMAL;
}

// target not allow have more one spell specific from same caster
bool IsSingleFromSpellSpecificPerTargetPerCaster(SpellSpecific spellSpec1, SpellSpecific spellSpec2)
{
    switch (spellSpec1)
    {
        case SPELL_BLESSING:
        case SPELL_AURA:
        case SPELL_STING:
        case SPELL_CURSE:
        case SPELL_ASPECT:
        case SPELL_POSITIVE_SHOUT:
        case SPELL_JUDGEMENT:
            return spellSpec1 == spellSpec2;
        default:
            return false;
    }
}

// target not allow have more one ranks from spell from spell specific per target
bool IsSingleFromSpellSpecificSpellRanksPerTarget(SpellSpecific spellSpec1, SpellSpecific spellSpec2)
{
    switch (spellSpec1)
    {
        case SPELL_BLESSING:
        case SPELL_AURA:
        case SPELL_CURSE:
        case SPELL_ASPECT:
        case SPELL_POSITIVE_SHOUT:
            return spellSpec1 == spellSpec2;
        default:
            return false;
    }
}

// target not allow have more one spell specific per target from any caster
bool IsSingleFromSpellSpecificPerTarget(SpellSpecific spellSpec1, SpellSpecific spellSpec2)
{
    switch (spellSpec1)
    {
        case SPELL_SEAL:
        case SPELL_TRACKER:
        case SPELL_WARLOCK_ARMOR:
        case SPELL_MAGE_ARMOR:
        case SPELL_ELEMENTAL_SHIELD:
        case SPELL_MAGE_POLYMORPH:
        case SPELL_WELL_FED:
            return spellSpec1 == spellSpec2;
        case SPELL_BATTLE_ELIXIR:
            return spellSpec2 == SPELL_BATTLE_ELIXIR
                   || spellSpec2 == SPELL_FLASK_ELIXIR;
        case SPELL_GUARDIAN_ELIXIR:
            return spellSpec2 == SPELL_GUARDIAN_ELIXIR
                   || spellSpec2 == SPELL_FLASK_ELIXIR;
        case SPELL_FLASK_ELIXIR:
            return spellSpec2 == SPELL_BATTLE_ELIXIR
                   || spellSpec2 == SPELL_GUARDIAN_ELIXIR
                   || spellSpec2 == SPELL_FLASK_ELIXIR;
        case SPELL_FOOD:
            return spellSpec2 == SPELL_FOOD
                   || spellSpec2 == SPELL_FOOD_AND_DRINK;
        case SPELL_DRINK:
            return spellSpec2 == SPELL_DRINK
                   || spellSpec2 == SPELL_FOOD_AND_DRINK;
        case SPELL_FOOD_AND_DRINK:
            return spellSpec2 == SPELL_FOOD
                   || spellSpec2 == SPELL_DRINK
                   || spellSpec2 == SPELL_FOOD_AND_DRINK;
        default:
            return false;
    }
}

bool IsPositiveTarget(uint32 targetA, uint32 targetB)
{
    switch (targetA)
    {
            // non-positive targets
        case TARGET_CHAIN_DAMAGE:
        case TARGET_ALL_ENEMY_IN_AREA:
        case TARGET_ALL_ENEMY_IN_AREA_INSTANT:
        case TARGET_IN_FRONT_OF_CASTER:
        case TARGET_ALL_ENEMY_IN_AREA_CHANNELED:
        case TARGET_CURRENT_ENEMY_COORDINATES:
            return false;
            // positive or dependent
        case TARGET_CASTER_COORDINATES:
            return (targetB == TARGET_ALL_PARTY || targetB == TARGET_ALL_FRIENDLY_UNITS_AROUND_CASTER);
        default:
            break;
    }
    if (targetB)
    {
        return IsPositiveTarget(targetB, 0);
    }
    return true;
}

bool IsExplicitPositiveTarget(uint32 targetA)
{
    // positive targets that in target selection code expect target in m_targers, so not that auto-select target by spell data by m_caster and etc
    switch (targetA)
    {
        case TARGET_SINGLE_FRIEND:
        case TARGET_SINGLE_PARTY:
        case TARGET_CHAIN_HEAL:
        case TARGET_SINGLE_FRIEND_2:
        case TARGET_AREAEFFECT_PARTY_AND_CLASS:
            return true;
        default:
            break;
    }
    return false;
}

bool IsExplicitNegativeTarget(uint32 targetA)
{
    // non-positive targets that in target selection code expect target in m_targers, so not that auto-select target by spell data by m_caster and etc
    switch (targetA)
    {
        case TARGET_CHAIN_DAMAGE:
        case TARGET_CURRENT_ENEMY_COORDINATES:
            return true;
        default:
            break;
    }
    return false;
}

bool IsPositiveEffect(SpellEntry const* spellproto, SpellEffectIndex effIndex)
{
    //fast returns in some special cases
    switch (spellproto->Id)
    {
        case 13003:
        case 13010:
        case 13139: // net-o-matic special effect
        case 23182: // Mark of Frost
        case 23445: // evil twin
        case 25040: // Mark of Nature
            return false;
        default:
            break;
    }

    switch (spellproto->Effect[effIndex])
    {
        case SPELL_EFFECT_DUMMY:
            // some explicitly required dummy effect sets
            switch (spellproto->Id)
            {
                case 28441:                                 // AB Effect 000
                    return false;
                case 10258:                                 // Awaken Vault Warder
                case 18153:                                 // Kodo Kombobulator
                    return true;
                default:
                    break;
            }
            break;
            // always positive effects (check before target checks that provided non-positive result in some case for positive effects)
        case SPELL_EFFECT_HEAL:
        case SPELL_EFFECT_LEARN_SPELL:
        case SPELL_EFFECT_SKILL_STEP:
        case SPELL_EFFECT_QUEST_COMPLETE:
            return true;

            // non-positive aura use
        case SPELL_EFFECT_APPLY_AURA:
        {
            switch (spellproto->EffectApplyAuraName[effIndex])
            {
                case SPELL_AURA_DUMMY:
                {
                    // dummy aura can be positive or negative dependent from casted spell
                    switch (spellproto->Id)
                    {
                        case 13139:                         // net-o-matic special effect
                        case 18172:                         // Quest Kodo Roundup player debuff
                        case 23445:                         // evil twin
                            return false;
                            // some spells have unclear target modes for selection, so just make effect positive
                        case 27184:
                        case 27190:
                        case 27191:
                        case 27201:
                        case 27202:
                        case 27203:
                            return true;
                        default:
                            break;
                    }
                }   break;
                case SPELL_AURA_MOD_DAMAGE_DONE:            // dependent from base point sign (negative -> negative)
                case SPELL_AURA_MOD_RESISTANCE:
                case SPELL_AURA_MOD_STAT:
                case SPELL_AURA_MOD_SKILL:
                case SPELL_AURA_MOD_DODGE_PERCENT:
                case SPELL_AURA_MOD_HEALING_PCT:
                case SPELL_AURA_MOD_HEALING_DONE:
                    if (spellproto->CalculateSimpleValue(effIndex) < 0)
                    {
                        return false;
                    }
                    break;
                case SPELL_AURA_MOD_DAMAGE_TAKEN:           // dependent from bas point sign (positive -> negative)
                case SPELL_AURA_MOD_DAMAGE_PERCENT_TAKEN:
                    if (spellproto->CalculateSimpleValue(effIndex) < 0)
                    {
                        return true;
                    }
                    // let check by target modes (for Amplify Magic cases/etc)
                    break;
                case SPELL_AURA_MOD_SPELL_CRIT_CHANCE:
                case SPELL_AURA_MOD_INCREASE_HEALTH_PERCENT:
                case SPELL_AURA_MOD_DAMAGE_PERCENT_DONE:
                    if (spellproto->CalculateSimpleValue(effIndex) > 0)
                    {
                        return true; // some expected positive spells have SPELL_ATTR_EX_NEGATIVE or unclear target modes
                    }
                    break;
                case SPELL_AURA_ADD_TARGET_TRIGGER:
                    return true;
                case SPELL_AURA_PERIODIC_TRIGGER_SPELL:
                    if (spellproto->Id != spellproto->EffectTriggerSpell[effIndex])
                    {
                        uint32 spellTriggeredId = spellproto->EffectTriggerSpell[effIndex];
                        SpellEntry const* spellTriggeredProto = sSpellStore.LookupEntry(spellTriggeredId);

                        if (spellTriggeredProto)
                        {
                            // non-positive targets of main spell return early
                            for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
                            {
                                // if non-positive trigger cast targeted to positive target this main cast is non-positive
                                // this will place this spell auras as debuffs
                                if (spellTriggeredProto->Effect[i] &&
                                    IsPositiveTarget(spellTriggeredProto->EffectImplicitTargetA[i], spellTriggeredProto->EffectImplicitTargetB[i]) &&
                                    !IsPositiveEffect(spellTriggeredProto, SpellEffectIndex(i)))
                                    {
                                        return false;
                                    }
                            }
                        }
                    }
                    break;
                case SPELL_AURA_PROC_TRIGGER_SPELL:
                    // many positive auras have negative triggered spells at damage for example and this not make it negative (it can be canceled for example)
                    break;
                case SPELL_AURA_MOD_STUN:                   // have positive and negative spells, we can't sort its correctly at this moment.
                    if (effIndex == EFFECT_INDEX_0 && spellproto->Effect[EFFECT_INDEX_1] == 0 && spellproto->Effect[EFFECT_INDEX_2] == 0)
                    {
                        return false; // but all single stun aura spells is negative
                    }

                    // Petrification
                    if (spellproto->Id == 17624)
                    {
                        return false;
                    }
                    break;
                case SPELL_AURA_MOD_PACIFY_SILENCE:
                    if (spellproto->Id == 24740)            // Wisp Costume
                    {
                        return true;
                    }
                    return false;
                case SPELL_AURA_MOD_ROOT:
                case SPELL_AURA_MOD_SILENCE:
                    if (spellproto->Id == 24732)
                    {
                        return true;
                    }
                case SPELL_AURA_GHOST:
                case SPELL_AURA_PERIODIC_LEECH:
                case SPELL_AURA_MOD_STALKED:
                case SPELL_AURA_PERIODIC_DAMAGE_PERCENT:
                    return false;
                case SPELL_AURA_PERIODIC_DAMAGE:            // used in positive spells also.
                    // part of negative spell if casted at self (prevent cancel)
                    if (spellproto->EffectImplicitTargetA[effIndex] == TARGET_SELF)
                    {
                        return false;
                    }
                    break;
                case SPELL_AURA_MOD_DECREASE_SPEED:         // used in positive spells also
                    // part of positive spell if casted at self
                    if (spellproto->EffectImplicitTargetA[effIndex] == TARGET_SELF &&
                        spellproto->SpellFamilyName == SPELLFAMILY_GENERIC)
                        {
                            return false;
                        }
                    // but not this if this first effect (don't found better check)
                    if (spellproto->HasAttribute(SPELL_ATTR_AURA_IS_DEBUFF) && effIndex == EFFECT_INDEX_0)
                    {
                        return false;
                    }
                    break;
                case SPELL_AURA_MOD_SCALE:
                    // some spells negative
                    switch (spellproto->Id)
                    {
                        case 802:                           // Mutate Bug, wrongly negative by target modes
                            return true;
                    }
                    break;
                case SPELL_AURA_MECHANIC_IMMUNITY:
                {
                    // non-positive immunities
                    switch (spellproto->EffectMiscValue[effIndex])
                    {
                        case MECHANIC_BANDAGE:
                        case MECHANIC_SHIELD:
                        case MECHANIC_MOUNT:
                        case MECHANIC_INVULNERABILITY:
                            return false;
                        default:
                            break;
                    }
                }   break;
                case SPELL_AURA_ADD_FLAT_MODIFIER:          // mods
                case SPELL_AURA_ADD_PCT_MODIFIER:
                {
                    // non-positive mods
                    switch (spellproto->EffectMiscValue[effIndex])
                    {
                        case SPELLMOD_COST:                 // dependent from bas point sign (negative -> positive)
                        if(spellproto->Id == 12042)         // Arcane Power
                        {
                            break;
                        }
                            if (spellproto->CalculateSimpleValue(effIndex) > 0)
                            {
                                return false;
                            }
                            break;
                        default:
                            break;
                    }
                }   break;
                default:
                    break;
            }
            break;
        }
        case SPELL_EFFECT_SCRIPT_EFFECT:
        {
            if (spellproto->Id == 5249)
            {
                return false;
            }
            break;
        }

        default:
            break;
    }

    // non-positive targets
    if (!IsPositiveTarget(spellproto->EffectImplicitTargetA[effIndex], spellproto->EffectImplicitTargetB[effIndex]))
    {
        return false;
    }

    // AttributesEx check
    if (spellproto->HasAttribute(SPELL_ATTR_EX_CANT_BE_REFLECTED))
    {
        return false;
    }

    // ok, positive
    return true;
}

bool IsPositiveSpell(uint32 spellId)
{
    SpellEntry const* spellproto = sSpellStore.LookupEntry(spellId);
    if (!spellproto)
    {
        return false;
    }

    return IsPositiveSpell(spellproto);
}

bool IsPositiveSpell(SpellEntry const* spellproto)
{
    // spells with at least one negative effect are considered negative
    // some self-applied spells have negative effects but in self casting case negative check ignored.
    for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
        if (spellproto->Effect[i] && !IsPositiveEffect(spellproto, SpellEffectIndex(i)))
        {
            return false;
        }
    return true;
}

bool IsSingleTargetSpell(SpellEntry const* spellInfo)
{
    // hunter's mark and similar
    if (spellInfo->SpellVisual == 3239)
    {
        return true;
    }

    // exceptions (have spellInfo->AttributesEx & (1<<18) but not single targeted)
    switch (spellInfo->Id)
    {
        case 1833:                                          // Cheap Shot
        case 4538:                                          // Extract Essence (group targets)
        case 5106:                                          // Crystal Flash (group targets)
        case 5530:                                          // Mace Stun Effect
        case 5648:                                          // Stunning Blast, rank 1
        case 5649:                                          // Stunning Blast, rank 2
        case 5726:                                          // Stunning Blow, Rank 1
        case 5727:                                          // Stunning Blow, Rank 2
        case 6927:                                          // Shadowstalker Slash, Rank 1
        case 8399:                                          // Sleep (group targets)
        case 9159:                                          // Sleep (armor triggred affect)
        case 9256:                                          // Deep Sleep (group targets)
        case 13902:                                         // Fist of Ragnaros
        case 14902:                                         // Cheap Shot
        case 16104:                                         // Crystallize (group targets)
        case 17286:                                         // Crusader's Hammer (group targets)
        case 20277:                                         // Fist of Ragnaros (group targets)
        case 20669:                                         // Sleep (group targets)
        case 20683:                                         // Highlord's Justice
        case 24664:                                         // Sleep (group targets)
            return false;
    }
    // all other single target spells have if it has AttributesEx
    if (spellInfo->HasAttribute(SPELL_ATTR_EX_UNK18))
    {
        return true;
    }

    // can not be cast on another target while not cooled down anyway
    //if (GetSpellDuration(spellInfo) < int32(GetSpellRecoveryTime(spellInfo)))
    //    { return true; }

    // other single target
    // Fear
    if ((spellInfo->SpellIconID == 98 && spellInfo->SpellVisual == 336)
        // Banish
        || (spellInfo->SpellIconID == 96 && spellInfo->SpellVisual == 1305)
        // Entangling roots
        || spellInfo->IsFitToFamily(SPELLFAMILY_DRUID, ClassFamilyMask(UI64LIT(0x0200)))
       ) { return true; }

    // TODO - need found Judgements rule
    switch (GetSpellSpecific(spellInfo->Id))
    {
        case SPELL_JUDGEMENT:
            return true;
        default:
            break;
    }

    return false;
}

bool IsSingleTargetSpells(SpellEntry const* spellInfo1, SpellEntry const* spellInfo2)
{
    // TODO - need better check
    // Equal icon and spellfamily
    if (spellInfo1->SpellFamilyName == spellInfo2->SpellFamilyName &&
        spellInfo1->SpellIconID == spellInfo2->SpellIconID)
        {
            return true;
        }

    // TODO - need found Judgements rule
    SpellSpecific spec1 = GetSpellSpecific(spellInfo1->Id);
    // spell with single target specific types
    switch (spec1)
    {
        case SPELL_JUDGEMENT:
        case SPELL_MAGE_POLYMORPH:
            if (GetSpellSpecific(spellInfo2->Id) == spec1)
            {
                return true;
            }
            break;
        default:
            break;
    }

    return false;
}

SpellCastResult GetErrorAtShapeshiftedCast(SpellEntry const* spellInfo, uint32 form)
{
    // talents that learn spells can have stance requirements that need ignore
    // (this requirement only for client-side stance show in talent description)
    if (GetTalentSpellCost(spellInfo->Id) > 0 &&
        (spellInfo->Effect[EFFECT_INDEX_0] == SPELL_EFFECT_LEARN_SPELL || spellInfo->Effect[EFFECT_INDEX_1] == SPELL_EFFECT_LEARN_SPELL || spellInfo->Effect[EFFECT_INDEX_2] == SPELL_EFFECT_LEARN_SPELL))
    {
        return SPELL_CAST_OK;
    }

    uint32 stanceMask = (form ? 1 << (form - 1) : 0);

    if (stanceMask & spellInfo->StancesNot)                 // can explicitly not be casted in this stance
    {
        return SPELL_FAILED_NOT_SHAPESHIFT;
    }

    if (stanceMask & spellInfo->Stances)                    // can explicitly be casted in this stance
    {
        return SPELL_CAST_OK;
    }

    bool actAsShifted = false;
    if (form > 0)
    {
        SpellShapeshiftFormEntry const* shapeInfo = sSpellShapeshiftFormStore.LookupEntry(form);
        if (!shapeInfo)
        {
            sLog.outError("GetErrorAtShapeshiftedCast: unknown shapeshift %u", form);
            return SPELL_CAST_OK;
        }
        actAsShifted = !(shapeInfo->flags1 & 1);            // shapeshift acts as normal form for spells
    }

    if (actAsShifted)
    {
        if (spellInfo->HasAttribute(SPELL_ATTR_NOT_SHAPESHIFT)) // not while shapeshifted
        {
            return SPELL_FAILED_NOT_SHAPESHIFT;
        }
        else if (spellInfo->Stances != 0)                   // needs other shapeshift
        {
            return SPELL_FAILED_ONLY_SHAPESHIFT;
        }
    }
    else
    {
        // needs shapeshift
        if (!spellInfo->HasAttribute(SPELL_ATTR_EX2_NOT_NEED_SHAPESHIFT) && spellInfo->Stances != 0)
        {
            return SPELL_FAILED_ONLY_SHAPESHIFT;
        }
    }

    return SPELL_CAST_OK;
}

void SpellMgr::LoadSpellTargetPositions()
{
    mSpellTargetPositions.clear();                          // need for reload case

    uint32 count = 0;

    //                                                0   1           2                  3                  4                  5
    QueryResult* result = WorldDatabase.Query("SELECT `id`, `target_map`, `target_position_x`, `target_position_y`, `target_position_z`, `target_orientation` FROM `spell_target_position`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString(">> Loaded %u spell target destination coordinates", count);
        sLog.outString();
        return;
    }

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 Spell_ID = fields[0].GetUInt32();

        SpellTargetPosition st;

        st.target_mapId       = fields[1].GetUInt32();
        st.target_X           = fields[2].GetFloat();
        st.target_Y           = fields[3].GetFloat();
        st.target_Z           = fields[4].GetFloat();
        st.target_Orientation = fields[5].GetFloat();

        MapEntry const* mapEntry = sMapStore.LookupEntry(st.target_mapId);
        if (!mapEntry)
        {
            sLog.outErrorDb("Spell (ID:%u) target map (ID: %u) does not exist in `Map.dbc`.", Spell_ID, st.target_mapId);
            continue;
        }

        if (st.target_X == 0 && st.target_Y == 0 && st.target_Z == 0)
        {
            sLog.outErrorDb("Spell (ID:%u) target coordinates not provided.", Spell_ID);
            continue;
        }

        SpellEntry const* spellInfo = sSpellStore.LookupEntry(Spell_ID);
        if (!spellInfo)
        {
            sLog.outErrorDb("Spell (ID:%u) listed in `spell_target_position` does not exist.", Spell_ID);
            continue;
        }

        bool found = false;
        for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
        {
            if (spellInfo->EffectImplicitTargetA[i] == TARGET_TABLE_X_Y_Z_COORDINATES || spellInfo->EffectImplicitTargetB[i] == TARGET_TABLE_X_Y_Z_COORDINATES)
            {
                found = true;
                break;
            }
        }
        if (!found)
        {
            sLog.outErrorDb("Spell (Id: %u) listed in `spell_target_position` does not have target TARGET_TABLE_X_Y_Z_COORDINATES (17).", Spell_ID);
            continue;
        }

        mSpellTargetPositions[Spell_ID] = st;
        ++count;
    }
    while (result->NextRow());

    delete result;

    sLog.outString(">> Loaded %u spell target destination coordinates", count);
    sLog.outString();
}

template <typename EntryType, typename WorkerType, typename StorageType>
struct SpellRankHelper
{
    SpellRankHelper(SpellMgr& _mgr, StorageType& _storage): mgr(_mgr), worker(_storage), customRank(0) {}
    void RecordRank(EntryType& entry, uint32 spell_id)
    {
        const SpellEntry* spell = sSpellStore.LookupEntry(spell_id);
        if (!spell)
        {
            sLog.outErrorDb("Spell %u listed in `%s` does not exist", spell_id, worker.TableName());
            return;
        }

        uint32 first_id = mgr.GetFirstSpellInChain(spell_id);

        // most spell ranks expected same data
        if (first_id)
        {
            firstRankSpells.insert(first_id);

            if (first_id != spell_id)
            {
                if (!worker.IsValidCustomRank(entry, spell_id, first_id))
                {
                    return;
                }
                // for later check that first rank also added
                else
                {
                    firstRankSpellsWithCustomRanks.insert(first_id);
                    ++customRank;
                }
            }
        }

        worker.AddEntry(entry, spell);
    }
    void FillHigherRanks()
    {
        // check that first rank added for custom ranks
        for (std::set<uint32>::const_iterator itr = firstRankSpellsWithCustomRanks.begin(); itr != firstRankSpellsWithCustomRanks.end(); ++itr)
            if (!worker.HasEntry(*itr))
            {
                sLog.outErrorDb("Spell %u must be listed in `%s` as first rank for listed custom ranks of spell but not found!", *itr, worker.TableName());
            }

        // fill absent non first ranks data base at first rank data
        for (std::set<uint32>::const_iterator itr = firstRankSpells.begin(); itr != firstRankSpells.end(); ++itr)
        {
            if (worker.SetStateToEntry(*itr))
            {
                mgr.doForHighRanks(*itr, worker);
            }
        }
    }
    std::set<uint32> firstRankSpells;
    std::set<uint32> firstRankSpellsWithCustomRanks;

    SpellMgr& mgr;
    WorkerType worker;
    uint32 customRank;
};

struct DoSpellProcEvent
{
    DoSpellProcEvent(SpellProcEventMap& _spe_map) : spe_map(_spe_map), customProc(0), count(0) {}
    void operator()(uint32 spell_id)
    {
        SpellProcEventEntry const& spe = state->second;
        // add ranks only for not filled data (some ranks have ppm data different for ranks for example)
        SpellProcEventMap::const_iterator spellItr = spe_map.find(spell_id);
        if (spellItr == spe_map.end())
        {
            spe_map[spell_id] = spe;
        }
        // if custom rank data added then it must be same except ppm
        else
        {
            SpellProcEventEntry const& r_spe = spellItr->second;
            if (spe.schoolMask != r_spe.schoolMask)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` as custom rank have different schoolMask from first rank in chain", spell_id);
            }

            if (spe.spellFamilyName != r_spe.spellFamilyName)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` as custom rank have different spellFamilyName from first rank in chain", spell_id);
            }

            for (int32 i = 0; i < MAX_EFFECT_INDEX; ++i)
            {
                if (spe.spellFamilyMask[i] != r_spe.spellFamilyMask[i])
                {
                    sLog.outErrorDb("Spell %u listed in `spell_proc_event` as custom rank have different spellFamilyMask from first rank in chain", spell_id);
                    break;
                }
            }

            if (spe.procFlags != r_spe.procFlags)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` as custom rank have different procFlags from first rank in chain", spell_id);
            }

            if (spe.procEx != r_spe.procEx)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` as custom rank have different procEx from first rank in chain", spell_id);
            }

            // only ppm allowed has been different from first rank

            if (spe.customChance != r_spe.customChance)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` as custom rank have different customChance from first rank in chain", spell_id);
            }

            if (spe.cooldown != r_spe.cooldown)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` as custom rank have different cooldown from first rank in chain", spell_id);
            }
        }
    }

    const char* TableName() { return "spell_proc_event"; }
    bool IsValidCustomRank(SpellProcEventEntry const& spe, uint32 entry, uint32 first_id)
    {
        // let have independent data in table for spells with ppm rates (exist rank dependent ppm rate spells)
        if (!spe.ppmRate)
        {
            sLog.outErrorDb("Spell %u listed in `spell_proc_event` is not first rank (%u) in chain", entry, first_id);
            // prevent loading since it won't have an effect anyway
            return false;
        }
        return true;
    }
    void AddEntry(SpellProcEventEntry const& spe, SpellEntry const* spell)
    {
        spe_map[spell->Id] = spe;

        bool isCustom = false;

        if (spe.procFlags == 0)
        {
            if (spell->procFlags == 0)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` probally not triggered spell (no proc flags)", spell->Id);
            }
        }
        else
        {
            if (spell->procFlags == spe.procFlags)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` has exactly same proc flags as in spell.dbc, field value redundant", spell->Id);
            }
            else
            {
                isCustom = true;
            }
        }

        if (spe.customChance == 0)
        {
            /* enable for re-check cases, 0 chance ok for some cases because in some cases it set by another spell/talent spellmod)
            if (spell->procChance==0 && !spe.ppmRate)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` probally not triggered spell (no chance or ppm)", spell->Id);
            }
            */
        }
        else
        {
            if (spell->procChance == spe.customChance)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` has exactly same custom chance as in spell.dbc, field value redundant", spell->Id);
            }
            else
            {
                isCustom = true;
            }
        }

        // totally redundant record
        if (!spe.schoolMask && !spe.procFlags &&
            !spe.procEx && !spe.ppmRate && !spe.customChance && !spe.cooldown)
        {
            bool empty = !spe.spellFamilyName ? true : false;
            for (int32 i = 0; i < MAX_EFFECT_INDEX; ++i)
            {
                if (spe.spellFamilyMask[i])
                {
                    empty = false;
                    break;
                }
            }
            if (empty)
            {
                sLog.outErrorDb("Spell %u listed in `spell_proc_event` doesn't have any useful data", spell->Id);
            }
        }

        if (isCustom)
        {
            ++customProc;
        }
        else
        {
            ++count;
        }
    }

    bool HasEntry(uint32 spellId) { return spe_map.find(spellId) != spe_map.end(); }
    bool SetStateToEntry(uint32 spellId) { return (state = spe_map.find(spellId)) != spe_map.end(); }
    SpellProcEventMap& spe_map;
    SpellProcEventMap::const_iterator state;

    uint32 customProc;
    uint32 count;
};

void SpellMgr::LoadSpellProcEvents()
{
    mSpellProcEventMap.clear();                             // need for reload case

    //                                                0      1           2                3                 4                 5                 6          7       8        9             10
    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `SchoolMask`, `SpellFamilyName`, `SpellFamilyMask0`, `SpellFamilyMask1`, `SpellFamilyMask2`, `procFlags`, `procEx`, `ppmRate`, `CustomChance`, `Cooldown` FROM `spell_proc_event`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString();
        sLog.outString(">> No spell proc event conditions loaded");
        return;
    }

    SpellRankHelper<SpellProcEventEntry, DoSpellProcEvent, SpellProcEventMap> rankHelper(*this, mSpellProcEventMap);

    BarGoLink bar(result->GetRowCount());
    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 entry = fields[0].GetUInt32();

        SpellProcEventEntry spe;

        spe.schoolMask      = fields[1].GetUInt32();
        spe.spellFamilyName = fields[2].GetUInt32();

        for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
        {
            spe.spellFamilyMask[i] = ClassFamilyMask(fields[3 + i].GetUInt64());
        }

        spe.procFlags       = fields[6].GetUInt32();
        spe.procEx          = fields[7].GetUInt32();
        spe.ppmRate         = fields[8].GetFloat();
        spe.customChance    = fields[9].GetFloat();
        spe.cooldown        = fields[10].GetUInt32();

        rankHelper.RecordRank(spe, entry);
    }
    while (result->NextRow());

    rankHelper.FillHigherRanks();

    delete result;

    sLog.outString(">> Loaded %u extra spell proc event conditions +%u custom proc (inc. +%u custom ranks)",  rankHelper.worker.count, rankHelper.worker.customProc, rankHelper.customRank);
    sLog.outString();
}

struct DoSpellProcItemEnchant
{
    DoSpellProcItemEnchant(SpellProcItemEnchantMap& _procMap, float _ppm) : procMap(_procMap), ppm(_ppm) {}
    void operator()(uint32 spell_id) { procMap[spell_id] = ppm; }

    SpellProcItemEnchantMap& procMap;
    float ppm;
};

void SpellMgr::LoadSpellProcItemEnchant()
{
    mSpellProcItemEnchantMap.clear();                       // need for reload case

    uint32 count = 0;

    //                                                0      1
    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `ppmRate` FROM `spell_proc_item_enchant`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString(">> Loaded %u proc item enchant definitions", count);
        sLog.outString();
        return;
    }

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 entry = fields[0].GetUInt32();
        float ppmRate = fields[1].GetFloat();

        SpellEntry const* spellInfo = sSpellStore.LookupEntry(entry);

        if (!spellInfo)
        {
            sLog.outErrorDb("Spell %u listed in `spell_proc_item_enchant` does not exist", entry);
            continue;
        }

        uint32 first_id = GetFirstSpellInChain(entry);

        if (first_id != entry)
        {
            sLog.outErrorDb("Spell %u listed in `spell_proc_item_enchant` is not first rank (%u) in chain", entry, first_id);
            // prevent loading since it won't have an effect anyway
            continue;
        }

        mSpellProcItemEnchantMap[entry] = ppmRate;

        // also add to high ranks
        DoSpellProcItemEnchant worker(mSpellProcItemEnchantMap, ppmRate);
        doForHighRanks(entry, worker);

        ++count;
    }
    while (result->NextRow());

    delete result;

    sLog.outString(">> Loaded %u proc item enchant definitions", count);
    sLog.outString();
}

struct DoSpellBonuses
{
    DoSpellBonuses(SpellBonusMap& _spellBonusMap, SpellBonusEntry const& _spellBonus) : spellBonusMap(_spellBonusMap), spellBonus(_spellBonus) {}
    void operator()(uint32 spell_id) { spellBonusMap[spell_id] = spellBonus; }

    SpellBonusMap& spellBonusMap;
    SpellBonusEntry const& spellBonus;
};

void SpellMgr::LoadSpellBonuses()
{
    mSpellBonusMap.clear();                             // need for reload case
    uint32 count = 0;

    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `direct_bonus`, `one_hand_direct_bonus`, `two_hand_direct_bonus`, \
        `direct_bonus_done`, `one_hand_direct_bonus_done`, `two_hand_direct_bonus_done`, \
        `direct_bonus_taken`, `one_hand_direct_bonus_taken`, `two_hand_direct_bonus_taken`, \
        `dot_bonus`, `ap_bonus`, `ap_dot_bonus` FROM `spell_bonus_data`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString(">> Loaded %u spell bonus data", count);
        sLog.outString();
        return;
    }

    BarGoLink bar(result->GetRowCount());
    do
    {
        Field* fields = result->Fetch();
        bar.step();
        uint32 entry = fields[0].GetUInt32();

        SpellEntry const* spell = sSpellStore.LookupEntry(entry);
        if (!spell)
        {
            sLog.outErrorDb("Spell %u listed in `spell_bonus_data` does not exist", entry);
            continue;
        }

        uint32 first_id = GetFirstSpellInChain(entry);

        if (first_id != entry)
        {
            sLog.outErrorDb("Spell %u listed in `spell_bonus_data` is not first rank (%u) in chain", entry, first_id);
            // prevent loading since it won't have an effect anyway
            continue;
        }

        SpellBonusEntry sbe;

        sbe.direct_damage = fields[1].GetFloat();
        sbe.one_hand_direct_damage = fields[2].GetFloat();
        sbe.two_hand_direct_damage = fields[3].GetFloat();
        sbe.direct_damage_done = fields[4].GetFloat();
        sbe.one_hand_direct_damage_done = fields[5].GetFloat();
        sbe.two_hand_direct_damage_done = fields[6].GetFloat();
        sbe.direct_damage_taken = fields[7].GetFloat();
        sbe.one_hand_direct_damage_taken = fields[8].GetFloat();
        sbe.two_hand_direct_damage_taken = fields[9].GetFloat();
        sbe.dot_damage    = fields[10].GetFloat();
        sbe.ap_bonus      = fields[11].GetFloat();
        sbe.ap_dot_bonus   = fields[12].GetFloat();

        bool need_dot = false;
        bool need_direct = false;
        uint32 x = 0;                                       // count all, including empty, meaning: not all existing effect is DoTs/HoTs
        for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
        {
            if (!spell->Effect[i])
            {
                ++x;
                continue;
            }

            // DoTs/HoTs
            switch (spell->EffectApplyAuraName[i])
            {
                case SPELL_AURA_PERIODIC_DAMAGE:
                case SPELL_AURA_PERIODIC_DAMAGE_PERCENT:
                case SPELL_AURA_PERIODIC_LEECH:
                case SPELL_AURA_PERIODIC_HEAL:
                case SPELL_AURA_OBS_MOD_HEALTH:
                case SPELL_AURA_PERIODIC_MANA_LEECH:
                case SPELL_AURA_OBS_MOD_MANA:
                case SPELL_AURA_POWER_BURN_MANA:
                    need_dot = true;
                    ++x;
                    break;
                default:
                    break;
            }
        }

        // TODO: maybe add explicit list possible direct damage spell effects...
        if (x < MAX_EFFECT_INDEX)
        {
            need_direct = true;
        }

        // Check if direct_bonus is needed in `spell_bonus_data`
        float direct_calc = 0.0f;
        float direct_diff = 1000.0f;                        // for have big diff if no DB field value
        if (sbe.direct_damage)
        {
            direct_calc = CalculateDefaultCoefficient(spell, SPELL_DIRECT_DAMAGE);
            direct_diff = std::abs(sbe.direct_damage - direct_calc);
        }

        // Check if direct_bonus_done is needed in `spell_bonus_data`
        float direct_done_calc = 0.0f;
        float direct_done_diff = 1000.0f;
        if(sbe.direct_damage_done)
        {
            direct_done_calc = CalculateDefaultCoefficient(spell, SPELL_DIRECT_DAMAGE);
            direct_done_diff = std::abs(sbe.direct_damage_done - direct_done_calc);
        }

        // Check if direct_bonus_taken is needed in `spell_bonus_data`
        float direct_taken_calc = 0.0f;
        float direct_taken_diff = 1000.0f;
        if(sbe.direct_damage_taken)
        {
            direct_taken_calc = CalculateDefaultCoefficient(spell, SPELL_DIRECT_DAMAGE);
            direct_taken_diff = std::abs(sbe.direct_damage_taken - direct_taken_calc);
        }

        // Check if dot_bonus is needed in `spell_bonus_data`
        float dot_calc = 0.0f;
        float dot_diff = 1000.0f;                           // for have big diff if no DB field value
        if (sbe.dot_damage)
        {
            dot_calc = CalculateDefaultCoefficient(spell, DOT);
            dot_diff = std::abs(sbe.dot_damage - dot_calc);
        }

        // direct bonus
        if (direct_diff < 0.02f && !need_dot && !sbe.ap_bonus && !sbe.ap_dot_bonus)
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not needed (data from table: %f, calculated %f, difference of %f) and `dot_bonus` also not used",
                            entry, sbe.direct_damage, direct_calc, direct_diff);
        else if (direct_diff < 0.02f && dot_diff < 0.02f && !sbe.ap_bonus && !sbe.ap_dot_bonus)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not needed (data from table: %f, calculated %f, difference of %f) and ",
                            entry, sbe.direct_damage, direct_calc, direct_diff);
            sLog.outErrorDb("                                  ... `dot_bonus` not needed (data from table: %f, calculated %f, difference of %f)",
                            sbe.dot_damage, dot_calc, dot_diff);
        }
        else if (!need_direct && dot_diff < 0.02f && !sbe.ap_bonus && !sbe.ap_dot_bonus)
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `dot_bonus` not needed (data from table: %f, calculated %f, difference of %f) and direct also not used",
                            entry, sbe.dot_damage, dot_calc, dot_diff);
        else if (!need_direct && sbe.direct_damage)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not used (spell not have non-periodic affects)", entry);
        }
        else if (!need_dot && sbe.dot_damage)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `dot_bonus` not used (spell not have periodic affects)", entry);
        }

        // direct bonus done
        if (direct_done_diff < 0.02f && !need_dot && !sbe.ap_bonus && !sbe.ap_dot_bonus)
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not needed (data from table: %f, calculated %f, difference of %f) and `dot_bonus` also not used",
                            entry, sbe.direct_damage_done, direct_done_calc, direct_done_diff);
        else if (direct_done_diff < 0.02f && dot_diff < 0.02f && !sbe.ap_bonus && !sbe.ap_dot_bonus)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not needed (data from table: %f, calculated %f, difference of %f) and ",
                            entry, sbe.direct_damage_done, direct_done_calc, direct_done_diff);
            sLog.outErrorDb("                                  ... `dot_bonus` not needed (data from table: %f, calculated %f, difference of %f)",
                            sbe.dot_damage, dot_calc, dot_diff);
        }
        else if (!need_direct && sbe.direct_damage_done)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not used (spell not have non-periodic affects)", entry);
        }

        // direct bonus taken
        if (direct_taken_diff < 0.02f && !need_dot && !sbe.ap_bonus && !sbe.ap_dot_bonus)
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not needed (data from table: %f, calculated %f, difference of %f) and `dot_bonus` also not used",
                            entry, sbe.direct_damage_taken, direct_taken_calc, direct_taken_diff);
        else if (direct_taken_diff < 0.02f && dot_diff < 0.02f && !sbe.ap_bonus && !sbe.ap_dot_bonus)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not needed (data from table: %f, calculated %f, difference of %f) and ",
                            entry, sbe.direct_damage_taken, direct_taken_calc, direct_taken_diff);
            sLog.outErrorDb("                                  ... `dot_bonus` not needed (data from table: %f, calculated %f, difference of %f)",
                            sbe.dot_damage, dot_calc, dot_diff);
        }
        else if (!need_direct && sbe.direct_damage_taken)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `direct_bonus` not used (spell not have non-periodic affects)", entry);
        }

        if (!need_direct && sbe.ap_bonus)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `ap_bonus` not used (spell not have non-periodic affects)", entry);
        }
        else if (!need_dot && sbe.ap_dot_bonus)
        {
            sLog.outErrorDb("`spell_bonus_data` entry for spell %u `ap_dot_bonus` not used (spell not have periodic affects)", entry);
        }

        mSpellBonusMap[entry] = sbe;

        // also add to high ranks
        DoSpellBonuses worker(mSpellBonusMap, sbe);
        doForHighRanks(entry, worker);

        ++count;
    }
    while (result->NextRow());

    delete result;

    sLog.outString(">> Loaded %u extra spell bonus data",  count);
}

void SpellMgr::LoadSpellLinked()
{
    mSpellLinkedMap.clear();                          // need for reload case
    uint32 count = 0;
    //                                                0      1             2     3
    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `linked_entry`, `type`, `effect_mask` FROM `spell_linked`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString();
        sLog.outString(">> Spell linked definition not loaded - table empty");
        return;
    }

    BarGoLink bar(result->GetRowCount());
    do
    {
        Field *fields = result->Fetch();
        bar.step();
        uint32 entry       = fields[0].GetUInt32();
        uint32 linkedEntry = fields[1].GetUInt32();

        SpellEntry const* spell = sSpellStore.LookupEntry(entry);
        SpellEntry const* spell1 = sSpellStore.LookupEntry(linkedEntry);
        if (!spell || !spell1)
        {
            sLog.outErrorDb("Spells %u or %u listed in `spell_linked` does not exist", entry, linkedEntry);
            continue;
        }

        if (entry == linkedEntry)
        {
            sLog.outErrorDb("Spell %u linked with self!", entry);
            continue;
        }

        uint32 first_id = GetFirstSpellInChain(entry);

        if (first_id != entry)
        {
            sLog.outErrorDb("Spell %u listed in `spell_linked` is not first rank (%u) in chain", entry, first_id);
        }

        SpellLinkedEntry data;

        data.spellId      = entry;
        data.linkedId     = linkedEntry;
        data.type         = fields[2].GetUInt32();
        data.effectMask   = fields[3].GetUInt32();

        mSpellLinkedMap.insert(SpellLinkedMap::value_type(entry, data));

        ++count;

    }
    while (result->NextRow());

    delete result;

    sLog.outString();
    sLog.outString(">> Loaded %u spell linked definitions", count);
}

SpellLinkedSet SpellMgr::GetSpellLinked(uint32 spell_id, SpellLinkedType type) const
{
    SpellLinkedSet result;

    SpellLinkedMapBounds const& bounds = GetSpellLinkedMapBounds(spell_id);

    if (type < SPELL_LINKED_TYPE_MAX && bounds.first != bounds.second)
    {
        for (SpellLinkedMap::const_iterator itr = bounds.first; itr != bounds.second; ++itr)
        {
            if (itr->second.type == type)
            {
                result.insert(itr->second.linkedId);
            }
        }
    }
    return result;
}

bool SpellMgr::IsSpellProcEventCanTriggeredBy(SpellProcEventEntry const* spellProcEvent, uint32 EventProcFlag, SpellEntry const* procSpell, uint32 procFlags, uint32 procExtra)
{
    // No extra req need
    uint32 procEvent_procEx = PROC_EX_NONE;

    // check prockFlags for condition
    if ((procFlags & EventProcFlag) == 0)
    {
        return false;
    }

    // Always trigger for this
    if (EventProcFlag & (PROC_FLAG_KILLED | PROC_FLAG_KILL | PROC_FLAG_ON_TRAP_ACTIVATION))
    {
        return true;
    }

    if (spellProcEvent)     // Exist event data
    {
        // Store extra req
        procEvent_procEx = spellProcEvent->procEx;

        // For melee triggers
        if (procSpell == NULL)
        {
            // Check (if set) for school (melee attack have Normal school)
            if (spellProcEvent->schoolMask && (spellProcEvent->schoolMask & SPELL_SCHOOL_MASK_NORMAL) == 0)
            {
                return false;
            }
        }
        else // For spells need check school/spell family/family mask
        {
            // Check (if set) for school
            if (spellProcEvent->schoolMask && (spellProcEvent->schoolMask & GetSchoolMask(procSpell->School)) == 0)
            {
                return false;
            }

            // Check (if set) for spellFamilyName
            if (spellProcEvent->spellFamilyName && (spellProcEvent->spellFamilyName != procSpell->SpellFamilyName))
            {
                return false;
            }
        }
    }

    // Check for extra req (if none) and hit/crit
    if (procEvent_procEx == PROC_EX_NONE)
    {
        // Don't allow proc from periodic heal if no extra requirement is defined
        if (EventProcFlag & (PROC_FLAG_ON_DO_PERIODIC | PROC_FLAG_ON_TAKE_PERIODIC) && (procExtra & PROC_EX_PERIODIC_POSITIVE))
        {
            return false;
        }

        // No extra req, so can trigger for (damage/healing present) and hit/crit
        if (procExtra & (PROC_EX_NORMAL_HIT | PROC_EX_CRITICAL_HIT))
        {
            return true;
        }
    }
    else // all spells hits here only if resist/reflect/immune/evade
    {
        // Exist req for PROC_EX_EX_TRIGGER_ALWAYS
        if (procEvent_procEx & PROC_EX_EX_TRIGGER_ALWAYS)
        {
            return true;
        }
        // Check Extra Requirement like (hit/crit/miss/resist/parry/dodge/block/immune/reflect/absorb and other)
        if (procEvent_procEx & procExtra)
        {
            return true;
        }
    }
    return false;
}

void SpellMgr::LoadSpellElixirs()
{
    mSpellElixirs.clear();                                  // need for reload case

    uint32 count = 0;

    //                                                0      1
    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `mask` FROM `spell_elixir`");
    if (!result)
    {
        BarGoLink bar(1);

        bar.step();

        sLog.outString(">> Loaded %u spell elixir definitions", count);
        sLog.outString();
        return;
    }

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 entry = fields[0].GetUInt32();
        uint8 mask = fields[1].GetUInt8();

        SpellEntry const* spellInfo = sSpellStore.LookupEntry(entry);

        if (!spellInfo)
        {
            sLog.outErrorDb("Spell %u listed in `spell_elixir` does not exist", entry);
            continue;
        }

        mSpellElixirs[entry] = mask;

        ++count;
    }
    while (result->NextRow());

    delete result;

    sLog.outString(">> Loaded %u spell elixir definitions", count);
    sLog.outString();
}

struct DoSpellThreat
{
    DoSpellThreat(SpellThreatMap& _threatMap) : threatMap(_threatMap), count(0) {}
    void operator()(uint32 spell_id)
    {
        SpellThreatEntry const& ste = state->second;
        // add ranks only for not filled data (spells adding flat threat are usually different for ranks)
        SpellThreatMap::const_iterator spellItr = threatMap.find(spell_id);
        if (spellItr == threatMap.end())
        {
            threatMap[spell_id] = ste;
        }

        // just assert that entry is not redundant
        else
        {
            SpellThreatEntry const& r_ste = spellItr->second;
            if (ste.threat == r_ste.threat && ste.multiplier == r_ste.multiplier && ste.ap_bonus == r_ste.ap_bonus)
            {
                sLog.outErrorDb("Spell %u listed in `spell_threat` as custom rank has same data as Rank 1, so redundant", spell_id);
            }
        }
    }
    const char* TableName() { return "spell_threat"; }
    bool IsValidCustomRank(SpellThreatEntry const& ste, uint32 entry, uint32 first_id)
    {
        if (!ste.threat)
        {
            sLog.outErrorDb("Spell %u listed in `spell_threat` is not first rank (%u) in chain and has no threat", entry, first_id);
            // prevent loading unexpected data
            return false;
        }
        return true;
    }
    void AddEntry(SpellThreatEntry const& ste, SpellEntry const* spell)
    {
        threatMap[spell->Id] = ste;

        // flat threat bonus and attack power bonus currently only work properly when all
        // effects have same targets, otherwise, we'd need to seperate it by effect index
        if (ste.threat || ste.ap_bonus != 0.f)
        {
            const uint32* targetA = spell->EffectImplicitTargetA;
            if ((targetA[EFFECT_INDEX_1] && targetA[EFFECT_INDEX_1] != targetA[EFFECT_INDEX_0]) ||
                (targetA[EFFECT_INDEX_2] && targetA[EFFECT_INDEX_2] != targetA[EFFECT_INDEX_0]))
            {
                sLog.outErrorDb("Spell %u listed in `spell_threat` has effects with different targets, threat may be assigned incorrectly", spell->Id);
            }
        }
        ++count;
    }
    bool HasEntry(uint32 spellId) { return threatMap.count(spellId) > 0; }
    bool SetStateToEntry(uint32 spellId) { return (state = threatMap.find(spellId)) != threatMap.end(); }

    SpellThreatMap& threatMap;
    SpellThreatMap::const_iterator state;
    uint32 count;
};

void SpellMgr::LoadSpellThreats()
{
    mSpellThreatMap.clear();                                // need for reload case

    //                                                0      1       2           3
    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `Threat`, `multiplier`, `ap_bonus` FROM `spell_threat`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString(">> No spell threat entries loaded.");
        sLog.outString();
        return;
    }

    SpellRankHelper<SpellThreatEntry, DoSpellThreat, SpellThreatMap> rankHelper(*this, mSpellThreatMap);

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 entry = fields[0].GetUInt32();

        SpellThreatEntry ste;
        ste.threat = fields[1].GetUInt16();
        ste.multiplier = fields[2].GetFloat();
        ste.ap_bonus = fields[3].GetFloat();

        rankHelper.RecordRank(ste, entry);
    }
    while (result->NextRow());

    rankHelper.FillHigherRanks();

    delete result;

    sLog.outString(">> Loaded %u spell threat entries", rankHelper.worker.count);
    sLog.outString();
}

void SpellMgr::ModDBCSpellAttributes()
{
    SpellEntry* spellInfo;

    // Hardcoded list for modified spell.
    std::list<uint32> list_spell_id;
    uint32 spell_id;

    list_spell_id.push_back(20647);
    list_spell_id.push_back(16870);

    for (std::list<uint32>::iterator it = list_spell_id.begin(); it != list_spell_id.end(); ++it)
    {
        spell_id = *it;
        spellInfo = (SpellEntry*)GetSpellStore()->LookupEntry(spell_id);
        if (!spellInfo)
        {
            continue;
        }

        switch(spell_id)
        {
            // Execute spell id 20647 is used to actually notify the client of the damage done.
            // If MeleeSpellHitResult method is executed for this spell id, it means that the spellId sent by the client for execute did already passed.
            case 20647:
                spellInfo->Attributes |= SPELL_ATTR_IMPOSSIBLE_DODGE_PARRY_BLOCK;
                spellInfo->AttributesEx3 |= SPELL_ATTR_EX3_CANT_MISS;
                break;
            case 16870:
                spellInfo->procFlags = PROC_FLAG_NONE;
                break;
        }
    }
}

bool SpellMgr::IsRankSpellDueToSpell(SpellEntry const* spellInfo_1, uint32 spellId_2) const
{
    SpellEntry const* spellInfo_2 = sSpellStore.LookupEntry(spellId_2);
    if (!spellInfo_1 || !spellInfo_2)
    {
        return false;
    }
    if (spellInfo_1->Id == spellId_2)
    {
        return false;
    }

    return GetFirstSpellInChain(spellInfo_1->Id) == GetFirstSpellInChain(spellId_2);
}

bool SpellMgr::canStackSpellRanksInSpellBook(SpellEntry const* spellInfo) const
{
    if (IsPassiveSpell(spellInfo))                          // ranked passive spell
    {
        return false;
    }
    if (spellInfo->powerType != POWER_MANA && spellInfo->powerType != POWER_HEALTH)
    {
        return false;
    }
    if (IsProfessionOrRidingSpell(spellInfo->Id))
    {
        return false;
    }

    if (IsSkillBonusSpell(spellInfo->Id))
    {
        return false;
    }

    // Any spell which has skill forward spell
    // Include party auras from paladins, stealth from rogues, shapeshift spells for druids...and more :)
    SkillLineAbilityMap::const_iterator itr = mSkillLineAbilityMap.find(spellInfo->Id);
    if (itr != mSkillLineAbilityMap.end())
    {
        if (itr->second->forward_spellid != 0)
        {
            return false;
        }
    }

    return true;
}

bool SpellMgr::IsNoStackSpellDueToSpell(uint32 spellId_1, uint32 spellId_2) const
{
    SpellEntry const* spellInfo_1 = sSpellStore.LookupEntry(spellId_1);
    SpellEntry const* spellInfo_2 = sSpellStore.LookupEntry(spellId_2);

    if (!spellInfo_1 || !spellInfo_2)
    {
        return false;
    }

    if (spellId_1 == spellId_2)
    {
        return false;
    }

    // Resurrection sickness
    if ((spellInfo_1->Id == SPELL_ID_PASSIVE_RESURRECTION_SICKNESS) != (spellInfo_2->Id == SPELL_ID_PASSIVE_RESURRECTION_SICKNESS))
    {
        return false;
    }

    // Allow stack passive and not passive spells
    if (spellInfo_1->HasAttribute(SPELL_ATTR_PASSIVE) != spellInfo_2->HasAttribute(SPELL_ATTR_PASSIVE))
    {
        return false;
    }

    // Gnomish Death Ray
    if (spellInfo_1->Id == 13278 || spellInfo_2->Id == 13278)
    {
        return false;
    }

    // Specific spell family spells
    switch (spellInfo_1->SpellFamilyName)
    {
        case SPELLFAMILY_GENERIC:
        {
            switch (spellInfo_2->SpellFamilyName)
            {
                case SPELLFAMILY_GENERIC:                   // same family case
                {
                    // Thunderfury
                    if ((spellInfo_1->Id == 21992 && spellInfo_2->Id == 27648) ||
                        (spellInfo_2->Id == 21992 && spellInfo_1->Id == 27648))
                    {
                        return false;
                    }

                    // Mark of Frost
                    if ((spellInfo_1->Id == 23182 && spellInfo_2->Id == 23183) ||
                        (spellInfo_2->Id == 23182 && spellInfo_1->Id == 23183))
                    {
                        return false;
                    }

                    // Lightning Speed (Mongoose) and Fury of the Crashing Waves (Tsunami Talisman)
                    if ((spellInfo_1->Id == 28093 && spellInfo_2->Id == 42084) ||
                        (spellInfo_2->Id == 28093 && spellInfo_1->Id == 42084))
                    {
                        return false;
                    }

                    // Soulstone Resurrection and Twisting Nether (resurrector)
                    if (spellInfo_1->SpellIconID == 92 && spellInfo_2->SpellIconID == 92 && (
                            (spellInfo_1->SpellVisual == 99 && spellInfo_2->SpellVisual == 0) ||
                            (spellInfo_2->SpellVisual == 99 && spellInfo_1->SpellVisual == 0)))
                            {
                                return false;
                            }

                    // Heart of the Wild and (Primal Instinct (Idol of Terror) triggering spell or Agility)
                    if (spellInfo_1->SpellIconID == 240 && spellInfo_2->SpellIconID == 240 && (
                            (spellInfo_1->SpellVisual == 0 && spellInfo_2->SpellVisual == 78) ||
                            (spellInfo_2->SpellVisual == 0 && spellInfo_1->SpellVisual == 78)))
                            {
                                return false;
                            }

                    // Personalized Weather (thunder effect should overwrite rainy aura)
                    if (spellInfo_1->SpellIconID == 2606 && spellInfo_2->SpellIconID == 2606)
                    {
                        return false;
                    }

                    // Brood Affliction: Bronze
                    if ((spellInfo_1->Id == 23170 && spellInfo_2->Id == 23171) ||
                        (spellInfo_2->Id == 23170 && spellInfo_1->Id == 23171))
                    {
                        return false;
                    }

                    // Regular and Night Elf Ghost
                    if ((spellInfo_1->Id == 8326 && spellInfo_2->Id == 20584) ||
                        (spellInfo_2->Id == 8326 && spellInfo_1->Id == 20584))
                    {
                        return false;
                    }

                    // Possess visual and Possess
                    if ((spellInfo_1->Id == 23014 && spellInfo_2->Id == 19832) ||
                        (spellInfo_2->Id == 23014 && spellInfo_1->Id == 19832))
                    {
                        return false;
                    }

                    // Dragonmaw Illusion, Blood Elf Illusion, Human Illusion, Illidari Agent Illusion, Scarlet Crusade Disguise
                    // Code refactoring
                    if (spellInfo_1->SpellIconID == 1691 && spellInfo_2->SpellIconID == 1691)
                    {
                        return false;
                    }

                    // Icon overload
                    // Eskhandar's Rake, Flurry (Warrior), Flurry (Shaman) and all spells with a SpellIconID = 108.
                    if (spellInfo_1->SpellIconID == 108 && spellInfo_2->SpellIconID == 108)
                    {
                        return false;
                    }

                    // Icon overload
                    // All Generic Spell with SpellIconID 320
                    // (e.g. Unstable Power and Cenarius' Wrath)
                    if (spellInfo_1->SpellIconID == 320 && spellInfo_2->SpellIconID == 320)
                    {
                        return false;
                    }

                    // Icon overload
                    // All Generic Spell with SpellIconID 61
                    // Noggenfogger Elixir and Will of forsaken
                    if (spellInfo_1->SpellIconID == 61 && spellInfo_2->SpellIconID == 61)
                    {
                        return false;
                    }

                    // Icon overload
                    // All Generic Spell with SpellIconID 502
                    // Ephemeral Power and Songflower Serenade
                    if (spellInfo_1->SpellIconID == 502 && spellInfo_2->SpellIconID == 502)
                    {
                        return false;
                    }

                    // Icon overload
                    // All Generic Spell with SpellIconID 200 et Ancestral Fortitude
                    // Second condition is usefull to avoid stacking Ancestral Fortitude.
                    if ((spellInfo_1->SpellIconID == 200 && ((spellInfo_2->Id == 16177 || spellInfo_2->Id == 16236 || spellInfo_2->Id == 16237) && !(spellInfo_1->Id == 16177 || spellInfo_1->Id == 16236 || spellInfo_1->Id == 16237)))
                        || (spellInfo_2->SpellIconID == 200 && ((spellInfo_1->Id == 16177 || spellInfo_1->Id == 16236 || spellInfo_1->Id == 16237) && !(spellInfo_2->Id == 16177 || spellInfo_2->Id == 16236 || spellInfo_2->Id == 16237))))
                    {
                        return false;
                    }


                    // Icon overload
                    // All Generic Spell with SpellIconID 958 et Scare Beast
                    // Second condition is usefull to avoid stacking Scare Beast
                    if ((spellInfo_1->SpellIconID == 958 && ((spellInfo_2->Id == 14326 || spellInfo_2->Id == 14327 || spellInfo_2->Id == 1513) && !(spellInfo_1->Id == 1513 || spellInfo_1->Id == 14326 || spellInfo_1->Id == 14327)))
                        || (spellInfo_2->SpellIconID == 958 && ((spellInfo_1->Id == 14326 || spellInfo_1->Id == 14327 || spellInfo_1->Id == 1513) && !(spellInfo_2->Id == 1513 || spellInfo_2->Id == 14326 || spellInfo_2->Id == 14327))))
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_MAGE:
                {
                    // Arcane Intellect and Insight
                    if (spellInfo_2->SpellIconID == 125 && spellInfo_1->Id == 18820)
                    {
                        return false;
                    }

                    // Detect Invisibility and Mana Shield (multi-family check)
                    // Code refactoring
                    if (spellInfo_1->Id == 132 && spellInfo_2->IsFitToFamilyMask(0x0000000000008000))
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_WARRIOR:
                {
                    // Defensive State Dummy and Shield Block
                    if (spellInfo_1->Id == 5302 && spellInfo_2->Id == 2565)
                    {
                        return false;
                    }

                    // Scroll of Protection and Defensive Stance (multi-family check)
                    if (spellInfo_1->SpellIconID == 276 && spellInfo_2->Id == 71)
                    {
                        return false;
                    }

                    // Hamstring -> Improved Hamstring (multi-family check)
                    // Code refactoring
                    if (spellInfo_1->Id == 23694 && spellInfo_2->IsFitToFamilyMask(0x0000000000000002))
                    {
                        return false;
                    }

                    // Icon overload
                    // Warrior Battle Shout and All Generic Spell with SpellIconID 456.
                    if(spellInfo_1->SpellIconID==456 && spellInfo_2->IsFitToFamilyMask(0x0000000000010000))
                    {
                        return false;
                    }

                    // Icon overload
                    // Warrior Rend and All Generic Spell with SpellIconID 245.
                    if(spellInfo_1->SpellIconID==245 && spellInfo_2->IsFitToFamilyMask(0x0000000000000020))
                    {
                        return false;
                    }

                    // Icon overload
                    // Les spells Warrior Recklessness and All Generic Spell with SpellIconID 138.
                    if(spellInfo_1->SpellIconID==138 && spellInfo_2->IsFitToFamilyMask(0x0000000000000010))
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_DRUID:
                {
                    // Scroll of Stamina and Leader of the Pack (multi-family check)
                    if (spellInfo_1->SpellIconID == 312 && spellInfo_2->Id == 24932)
                    {
                        return false;
                    }

                    // Dragonmaw Illusion (multi-family check)
                    if (spellId_1 == 40216 && spellId_2 == 42016)
                    {
                        return false;
                    }

                    // Icon overload
                    // Rip and All Generic Spell with SpellIconID 108.
                    if (spellInfo_1->SpellIconID==108 && spellInfo_2->IsFitToFamilyMask(0x0000000000800000))
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_ROGUE:
                {
                    // Garrote-Silence -> Garrote (multi-family check)
                    if (spellInfo_1->SpellIconID == 498 && spellInfo_1->SpellVisual == 0 && spellInfo_2->SpellIconID == 498)
                    {
                        return false;
                    }

                    // Icon overload
                    // Rogue gouge and All Generic Spell with SpellIconID 245.
                    if(spellInfo_1->SpellIconID==245 && spellInfo_2->IsFitToFamilyMask(0x0000000000000008))
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_HUNTER:
                {
                    // Concussive Shot and Imp. Concussive Shot (multi-family check)
                    if (spellInfo_1->SpellIconID == 15 && spellInfo_2->IsFitToFamilyMask(0x0000000000000200))
                    {
                        return false;
                    }

                    // Improved Wing Clip -> Wing Clip (multi-family check)
                    if (spellInfo_1->SpellIconID == 517 && spellInfo_2->IsFitToFamilyMask(0x0000000000000040))
                    {
                        return false;
                    }
                    break;
                }
                case SPELLFAMILY_PALADIN:
                {
                    // *Sanctity Aura -> Unstable Currents and other (multi-family check)
                    if (spellInfo_1->SpellIconID == 502 && spellInfo_2->IsFitToFamilyMask(0x0000000004000000))
                    {
                        return false;
                    }

                    // *Band of Eternal Champion and Seal of Command(multi-family check)
                    if (spellId_1 == 35081 && spellInfo_2->SpellIconID == 561 && spellInfo_2->SpellVisual == 7992)
                    {
                        return false;
                    }

                    // Icon overload
                    // Shadow Resistance Aura et All Generic Spell with SpellIconID 140.
                    if (spellInfo_1->SpellIconID==140 && spellInfo_2->IsFitToFamilyMask(0x0000000004000000))
                    {
                        return false;
                    }

                    // Icon overload
                    // Devotion Aura and All Generic Spell with SpellIconID 291.
                    if (spellInfo_1->SpellIconID==291 && spellInfo_2->IsFitToFamilyMask(0x0000000000000040))
                    {
                        return false;
                    }

                    // Icon overload
                    // Blessing of Freedom and All Generic Spell with SpellIconID 80.
                    if (spellInfo_1->SpellIconID==80 && spellInfo_2->IsFitToFamilyMask(0x0000000010000010))
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_PRIEST:
                {
                    // Icon overload
                    // All Generic Spell with SpellIconID 207 et Shadow Protection.
                    if (spellInfo_1->SpellIconID == 207 && spellInfo_2->IsFitToFamilyMask(0x0000000000000100))
                    {
                        return false;
                    }

                    // Icon overload
                    // All Generic Spell with SpellIconID 264 et Abolish Disease.
                    if (spellInfo_1->SpellIconID == 264 && spellInfo_2->IsFitToFamilyMask(0x0000000180000000))
                    {
                        return false;
                    }
                    break;
                }
                case SPELLFAMILY_WARLOCK:
                {
                    // Icon overload
                    // All Generic Spell with SpellIconID 313 and Warlock Corruption.
                    if (spellInfo_1->SpellIconID == 313 && spellInfo_2->IsFitToFamilyMask(0x0000000000000002))
                    {
                        return false;
                    }
                    break;
                }
            }

            break;
        }
        case SPELLFAMILY_MAGE:
        {
            switch(spellInfo_2->SpellFamilyName)
            {
                case SPELLFAMILY_GENERIC:
                {
                    // Detect Invisibility and Mana Shield (multi-family check)
                    // Code refactoring
                    if (spellInfo_2->Id == 132 && spellInfo_1->IsFitToFamilyMask(0x0000000000008000))
                    {
                        return false;
                    }

                    // Ice Block and Mark of Frost
                    if (spellInfo_2->Id == 23182 && spellInfo_1->Id == 11958)
                    {
                        return true;
                    }

                    // Arcane Intellect and Insight
                    // Code refactoring
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000000400) && spellInfo_2->Id == 18820)
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_MAGE:
                {
                    // Blizzard & Chilled (and some other stacked with blizzard spells
                    if (((spellInfo_1->SpellFamilyFlags & UI64LIT(0x80)) && (spellInfo_2->SpellFamilyFlags & UI64LIT(0x100000))) ||
                        ((spellInfo_2->SpellFamilyFlags & UI64LIT(0x80)) && (spellInfo_1->SpellFamilyFlags & UI64LIT(0x100000))))
                    {
                        return false;
                    }

                    // Blink & Improved Blink
                    if (((spellInfo_1->SpellFamilyFlags & UI64LIT(0x0000000000010000)) && (spellInfo_2->SpellVisual == 72 && spellInfo_2->SpellIconID == 1499)) ||
                        ((spellInfo_2->SpellFamilyFlags & UI64LIT(0x0000000000010000)) && (spellInfo_1->SpellVisual == 72 && spellInfo_1->SpellIconID == 1499)))
                    {
                        return false;
                    }

                    // Fireball & Pyroblast (Dots)
                    if (((spellInfo_1->SpellFamilyFlags & UI64LIT(0x1)) && (spellInfo_2->SpellFamilyFlags & UI64LIT(0x400000))) ||
                        ((spellInfo_2->SpellFamilyFlags & UI64LIT(0x1)) && (spellInfo_1->SpellFamilyFlags & UI64LIT(0x400000))))
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_PALADIN:
                {
                    // Combustion and Fire Protection Aura (multi-family check)
                    // Code refactoring
                    if (spellInfo_1->Id == 28682 && spellInfo_2->IsFitToFamilyMask(0x0000000004000000))
                    {
                        return false;
                    }

                    break;
                }
            }

            break;
        }
        case SPELLFAMILY_WARLOCK:
        {
            switch(spellInfo_2->SpellFamilyName){
                case SPELLFAMILY_GENERIC:
                    // Icon overload
                    // All Generic Spell with SpellIconID 313 and Warlock Corruption
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000000002) && spellInfo_2->SpellIconID == 313)
                    {
                        return false;
                    }
                    break;
                case SPELLFAMILY_WARLOCK:
                    // Siphon Life and Drain Life
                    if ((spellInfo_1->SpellIconID == 152 && spellInfo_2->SpellIconID == 546) ||
                        (spellInfo_2->SpellIconID == 152 && spellInfo_1->SpellIconID == 546))
                    {
                        return false;
                    }

                    // Corruption & Seed of corruption
                    if ((spellInfo_1->SpellIconID == 313 && spellInfo_2->SpellIconID == 1932) ||
                        (spellInfo_2->SpellIconID == 313 && spellInfo_1->SpellIconID == 1932))
                        if (spellInfo_1->SpellVisual != 0 && spellInfo_2->SpellVisual != 0)
                        {
                            return true; // can't be stacked
                        }

                    // Corruption and (Curse of Agony or Curse of Doom)
                    if ((spellInfo_1->SpellIconID == 313 && (spellInfo_2->SpellIconID == 544  || spellInfo_2->SpellIconID == 91)) ||
                        (spellInfo_2->SpellIconID == 313 && (spellInfo_1->SpellIconID == 544  || spellInfo_1->SpellIconID == 91)))
                    {
                        return false;
                    }
                    break;
                case SPELLFAMILY_PRIEST:
                    // Icon overload
                    // Sacrifice Demoniac effects and Psychic scream
                    if (spellInfo_1->SpellIconID == 1488 && spellInfo_2->IsFitToFamilyMask(0x0000000000010000))
                    {
                        return false;
                    }
                    break;
            }
            break;
        }
        case SPELLFAMILY_WARRIOR:
        {
            switch(spellInfo_2->SpellFamilyName){
                case SPELLFAMILY_GENERIC:
                    // Defensive Stance and Scroll of Protection (multi-family check)
                    if (spellInfo_1->Id == 71 && spellInfo_2->SpellIconID == 276)
                    {
                        return false;
                    }

                    // Hamstring -> Improved Hamstring (multi-family check)
                    // Refactoring de code
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000000002) && spellInfo_2->Id == 23694)
                    {
                        return false;
                    }

                    // Icon overload
                    // Warrior Battle Shout and All Generic Spell with SpellIconID 456.
                    //
                    if(spellInfo_1->IsFitToFamilyMask(0x0000000000010000) && spellInfo_2->SpellIconID==456)
                    {
                        return false;
                    }

                    // Icon overload
                    // Warrior Rend and All Generic Spell with SpellIconID 245.
                    //
                    if(spellInfo_1->IsFitToFamilyMask(0x0000000000000020) && spellInfo_2->SpellIconID==245)
                    {
                        return false;
                    }

                    // Icon overload
                    // Warrior Recklessness and All Generic Spell with SpellIconID 138.
                    //
                    if(spellInfo_1->IsFitToFamilyMask(0x0000000000000010) && spellInfo_2->SpellIconID==138)
                    {
                        return false;
                    }

                    break;
                case SPELLFAMILY_WARRIOR:
                    // Rend and Deep Wound
                    if (((spellInfo_1->SpellFamilyFlags & UI64LIT(0x20)) && (spellInfo_2->SpellFamilyFlags & UI64LIT(0x1000000000))) ||
                        ((spellInfo_2->SpellFamilyFlags & UI64LIT(0x20)) && (spellInfo_1->SpellFamilyFlags & UI64LIT(0x1000000000))))
                    {
                        return false;
                    }

                    // Battle Shout and Rampage
                    if ((spellInfo_1->SpellIconID == 456 && spellInfo_2->SpellIconID == 2006) ||
                        (spellInfo_2->SpellIconID == 456 && spellInfo_1->SpellIconID == 2006))
                    {
                        return false;
                    }

                    // Battle Shout and Demoralizing Shout
                    if ((spellInfo_1->IsFitToFamilyMask(0x0000000000020000) && spellInfo_2->IsFitToFamilyMask(0x0000000000010000)) ||
                        (spellInfo_1->IsFitToFamilyMask(0x0000000000010000) && spellInfo_2->IsFitToFamilyMask(0x0000000000020000)))
                    {
                        return false;
                    }

                    // Icon overload
                    // Warrior spell with SpellIconID 84.
                    // Load general's sword et Berserker Stance
                    if(spellInfo_1->SpellIconID==84 && spellInfo_2->SpellIconID==84)
                    {
                        return false;
                    }
                    break;
                case SPELLFAMILY_PALADIN:
                    // Icon overload
                    // Devotion Aura and Savior's Sacrifice
                    if(spellInfo_2->IsFitToFamilyMask(0x0000000000000040) && spellInfo_1->SpellIconID==291)
                    {
                        return false;
                    }
                    break;
                case SPELLFAMILY_ROGUE:
                {
                    // Icon overload
                    // Rogue Gouge and Warrior Rend
                    if(spellInfo_1->IsFitToFamilyMask(0x0000000000000020) && spellInfo_2->IsFitToFamilyMask(0x0000000000000008))
                    {
                        return false;
                    }

                    break;
                }
            }

            break;
        }
        case SPELLFAMILY_PRIEST:
            switch(spellInfo_2->SpellFamilyName){
                case SPELLFAMILY_GENERIC:
                    // Icon overload
                    // All Generic Spell with SpellIconID 207 and Shadow Protection.
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000000100) && spellInfo_2->SpellIconID == 207)
                    {
                        return false;
                    }

                    // Icon overload
                    // All Generic Spell with SpellIconID 264 and Abolish Disease.
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000180000000) && spellInfo_2->SpellIconID == 264)
                    {
                        return false;
                    }

                    break;
                case SPELLFAMILY_PRIEST:
                    // Devouring Plague and Shadow Vulnerability
                    if (((spellInfo_1->SpellFamilyFlags & UI64LIT(0x2000000)) && (spellInfo_2->SpellFamilyFlags & UI64LIT(0x4000000))) ||
                        ((spellInfo_2->SpellFamilyFlags & UI64LIT(0x2000000)) && (spellInfo_1->SpellFamilyFlags & UI64LIT(0x4000000))))
                    {
                        return false;
                    }

                    // StarShards and Shadow Word: Pain
                    if (((spellInfo_1->SpellFamilyFlags & UI64LIT(0x200000)) && (spellInfo_2->SpellFamilyFlags & UI64LIT(0x8000))) ||
                        ((spellInfo_2->SpellFamilyFlags & UI64LIT(0x200000)) && (spellInfo_1->SpellFamilyFlags & UI64LIT(0x8000))))
                    {
                        return false;
                    }
                    break;

                case SPELLFAMILY_WARLOCK:
                    // Icon overload
                    // Sacrifice demoniac effect and Psychic scream.
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000010000) && spellInfo_2->SpellIconID == 1488)
                    {
                        return false;
                    }

                    break;

                case SPELLFAMILY_DRUID:
                    // Holy Power (Pal T3 (6)) -- Rogue/Hunt buff
                    // + blessed sunfruit
                    if (spellInfo_1->SpellIconID == 52 && spellInfo_2->Id == 28791)
                    {
                        return false;
                    }

                    // Totem Power (Shaman T3 (6)) -- Rogue/Hunt buff
                    // + blessed sunfruit
                    if (spellInfo_1->SpellIconID == 52 && spellInfo_2->Id == 28826)
                    {
                        return false;
                    }

                    // Holy Power (Pal T3 (6)) -- Mana buff and all spells with SpellIconID 1873.
                    if (spellInfo_1->SpellIconID == 1873 && spellInfo_2->Id == 28795)
                    {
                        return false;
                    }

                    // Totem Power (Shaman T3 (6)) -- Mana buff and all spells with SpellIconID 1873.
                    if (spellInfo_1->SpellIconID == 1873 && spellInfo_2->Id == 28824)
                    {
                        return false;
                    }

                    break;
            }
            break;
        case SPELLFAMILY_DRUID:
            switch(spellInfo_2->SpellFamilyName){
                case SPELLFAMILY_GENERIC:
                    // Icon overload
                    // Rip and All Generic Spell with SpellIconID 108.
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000800000) && spellInfo_1->SpellIconID==108)
                    {
                        return false;
                    }

                    // Leader of the Pack and Scroll of Stamina (multi-family check)
                    if (spellInfo_1->Id == 24932 && spellInfo_2->SpellIconID == 312)
                    {
                        return false;
                    }

                    break;
                case SPELLFAMILY_DRUID:
                    // Cat Form and Feline Swiftness Passive* (1.x specific conflict)
                    if (spellInfo_1->SpellIconID == 493 && spellInfo_2->SpellIconID == 493)
                    {
                        return false;
                    }

                    // Omen of Clarity and Blood Frenzy
                    if (((!spellInfo_1->SpellFamilyFlags && spellInfo_1->SpellIconID == 108) && (spellInfo_2->SpellFamilyFlags & UI64LIT(0x20000000000000))) ||
                        ((!spellInfo_2->SpellFamilyFlags && spellInfo_2->SpellIconID == 108) && (spellInfo_1->SpellFamilyFlags & UI64LIT(0x20000000000000))))
                    {
                        return false;
                    }
                    break;

                case SPELLFAMILY_PALADIN:
                    // Holy Power (Pal T3 (6)) -- Tank buff
                    // Blessing of Kings
                    if (spellInfo_1->Id == 28790 && spellInfo_2->IsFitToFamilyMask(0x0000000011000000))
                    {
                        return false;
                    }

                    break;

                case SPELLFAMILY_PRIEST:
                    // Holy Power (Pal T3 (6)) -- Rogue/Hunt buff
                    // + blessed sunfruit
                    if (spellInfo_1->Id == 28791 && spellInfo_2->SpellIconID == 52)
                    {
                        return false;
                    }

                    // Totem Power (Shaman T3 (6)) -- Rogue/Hunt buff
                    // + blessed sunfruit
                    if (spellInfo_1->Id == 28826 && spellInfo_2->SpellIconID == 52)
                    {
                        return false;
                    }

                    // Holy Power (Pal T3 (6)) -- Mana buff and All Generic Spell with SpellIconID 1873.
                    if (spellInfo_1->Id == 28795 && spellInfo_2->SpellIconID == 1873)
                    {
                        return false;
                    }

                    // Totem Power (Shaman T3 (6)) -- Mana buff and All Generic Spell with SpellIconID 1873.
                    if (spellInfo_1->Id == 28824 && spellInfo_2->SpellIconID == 1873)
                    {
                        return false;
                    }

                    break;
            }

            break;
        case SPELLFAMILY_ROGUE:
            switch(spellInfo_2->SpellFamilyName){
                case SPELLFAMILY_GENERIC:
                {
                    // Icon overload
                    // Rogue Gouge and All Generic Spell with SpellIconID 245.
                    if(spellInfo_1->IsFitToFamilyMask(0x0000000000000008) && spellInfo_2->SpellIconID==245)
                    {
                        return false;
                    }

                    break;
                }
                case SPELLFAMILY_WARRIOR:
                {
                    // Icon overload
                    // Rogue Gouge and Warrior Rend
                    if(spellInfo_1->IsFitToFamilyMask(0x0000000000000008) && spellInfo_2->IsFitToFamilyMask(0x0000000000000020))
                    {
                        return false;
                    }

                    break;
                }
            }

            break;
        case SPELLFAMILY_HUNTER:
            switch(spellInfo_2->SpellFamilyName)
            {
                case SPELLFAMILY_GENERIC:
                    // Wing Clip -> Improved Wing Clip (multi-family check)
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000000040) && spellInfo_2->SpellIconID == 517)
                    {
                        return false;
                    }

                    // Concussive Shot and Imp. Concussive Shot (multi-family check)
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000000200) && spellInfo_2->SpellIconID == 15)
                    {
                        return false;
                    }

                    break;
                case SPELLFAMILY_HUNTER:
                    // Rapid Fire & Quick Shots
                    if (((spellInfo_1->SpellFamilyFlags & UI64LIT(0x20)) && (spellInfo_2->SpellFamilyFlags & UI64LIT(0x20000000000))) ||
                        ((spellInfo_2->SpellFamilyFlags & UI64LIT(0x20)) && (spellInfo_1->SpellFamilyFlags & UI64LIT(0x20000000000))))
                    {
                        return false;
                    }

                    // Serpent Sting & (Immolation/Explosive Trap Effect)
                    if (((spellInfo_1->SpellFamilyFlags & UI64LIT(0x4)) && (spellInfo_2->SpellFamilyFlags & UI64LIT(0x00000004000))) ||
                        ((spellInfo_2->SpellFamilyFlags & UI64LIT(0x4)) && (spellInfo_1->SpellFamilyFlags & UI64LIT(0x00000004000))))
                    {
                        return false;
                    }

                    // Bestial Wrath
                    if (spellInfo_1->SpellIconID == 1680 && spellInfo_2->SpellIconID == 1680)
                    {
                        return false;
                    }

                    break;
            }

            break;
        case SPELLFAMILY_PALADIN:
            switch(spellInfo_2->SpellFamilyName){
                case SPELLFAMILY_GENERIC:
                    // Icon overload
                    // Shadow Resistance Aura and All Generic Spell with SpellIconID 140.
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000004000000) && spellInfo_2->SpellIconID==140)
                    {
                        return false;
                    }

                    // Icon overload
                    // Devotion Aura and All Generic Spell with SpellIconID 291.
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000000000040) && spellInfo_2->SpellIconID==291)
                    {
                        return false;
                    }

                    // Icon overload
                    // Blessing of Freedom and All Generic Spell with SpellIconID 80.
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000010000010) && spellInfo_2->SpellIconID==80)
                    {
                        return false;
                    }

                    // *Sanctity Aura -> Unstable Currents and other (multi-family check)
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000004000000) && spellInfo_2->SpellIconID == 502)
                    {
                        return false;
                    }

                    break;
                case SPELLFAMILY_PALADIN:
                    // Paladin Seals
                    if (IsSealSpell(spellInfo_1) && IsSealSpell(spellInfo_2))
                    {
                        return true;
                    }
                    // Concentration Aura and Improved Concentration Aura and Aura Mastery
                    if ((spellInfo_1->SpellIconID == 1487) && (spellInfo_2->SpellIconID == 1487))
                    {
                        return false;
                    }

                    // Seal of crusader and Judgement of crusader effect
                    if (spellInfo_1->SpellIconID == 237 && spellInfo_2->SpellIconID == 237)
                    {
                        return false;
                    }

                    // Seal of light and Judgement of light effect
                    if (spellInfo_1->SpellIconID == 299 && spellInfo_2->SpellIconID == 299)
                    {
                        return false;
                    }

                    // Seal of mana and Judgement of mana effect
                    if (spellInfo_1->SpellIconID == 206 && spellInfo_2->SpellIconID == 206)
                    {
                        return false;
                    }

                    // Seal of Justice and Judgement of Justice effect
                    if (spellInfo_1->SpellIconID == 307 && spellInfo_2->SpellIconID == 307)
                    {
                        return false;
                    }
                    break;
                case SPELLFAMILY_WARRIOR:
                    // Icon overload
                    // Devotion Aura and Savior's sacrifice.
                    if(spellInfo_1->IsFitToFamilyMask(0x0000000000000040) && spellInfo_2->SpellIconID==291)
                    {
                        return false;
                    }
                    break;

                case SPELLFAMILY_DRUID:
                    // Holy Power (Pal T3 (6)) -- Tank buff
                    // Blessing of kings.
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000011000000) && spellInfo_2->Id == 28790)
                    {
                        return false;
                    }

                    break;
                case SPELLFAMILY_MAGE:
                    // Combustion and Fire Protection Aura (multi-family check)
                    if (spellInfo_1->IsFitToFamilyMask(0x0000000004000000) && spellInfo_2->Id == 28682)
                    {
                        return false;
                    }

                    break;
            }

            break;
        case SPELLFAMILY_SHAMAN:
            switch(spellInfo_2->SpellFamilyName)
            {
                case SPELLFAMILY_SHAMAN:
                    // Windfury weapon
                    if (spellInfo_1->SpellIconID == 220 && spellInfo_2->SpellIconID == 220 &&
                        !spellInfo_1->IsFitToFamilyMask(spellInfo_2->SpellFamilyFlags))
                        {
                            return false;
                        }
                break;
            }

            break;
        default:
            break;
    }

    // more generic checks
    if (spellInfo_1->SpellIconID == spellInfo_2->SpellIconID &&
        spellInfo_1->SpellIconID != 0 && spellInfo_2->SpellIconID != 0)
    {
        bool isModifier = false;
        for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
        {
            if (spellInfo_1->EffectApplyAuraName[i] == SPELL_AURA_ADD_FLAT_MODIFIER ||
                spellInfo_1->EffectApplyAuraName[i] == SPELL_AURA_ADD_PCT_MODIFIER  ||
                spellInfo_2->EffectApplyAuraName[i] == SPELL_AURA_ADD_FLAT_MODIFIER ||
                spellInfo_2->EffectApplyAuraName[i] == SPELL_AURA_ADD_PCT_MODIFIER)
                {
                    isModifier = true;
                }
        }

        if (!isModifier)
        {
            return true;
        }
    }

    if (IsRankSpellDueToSpell(spellInfo_1, spellId_2))
    {
        return true;
    }

    if (spellInfo_1->SpellFamilyName == 0 || spellInfo_2->SpellFamilyName == 0)
    {
        return false;
    }

    if (spellInfo_1->SpellFamilyName != spellInfo_2->SpellFamilyName)
    {
        return false;
    }

    bool dummy_only = true;
    for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
    {
        if (spellInfo_1->Effect[i] != spellInfo_2->Effect[i] ||
            spellInfo_1->EffectItemType[i] != spellInfo_2->EffectItemType[i] ||
            spellInfo_1->EffectMiscValue[i] != spellInfo_2->EffectMiscValue[i] ||
            spellInfo_1->EffectApplyAuraName[i] != spellInfo_2->EffectApplyAuraName[i])
            {
                return false;
            }

        // ignore dummy only spells
        if (spellInfo_1->Effect[i] && spellInfo_1->Effect[i] != SPELL_EFFECT_DUMMY && spellInfo_1->EffectApplyAuraName[i] != SPELL_AURA_DUMMY)
        {
            dummy_only = false;
        }
    }
    if (dummy_only)
    {
        return false;
    }

    return true;
}

bool SpellMgr::IsProfessionOrRidingSpell(uint32 spellId)
{
    SpellEntry const* spellInfo = sSpellStore.LookupEntry(spellId);
    if (!spellInfo)
    {
        return false;
    }

    if (spellInfo->Effect[EFFECT_INDEX_1] != SPELL_EFFECT_SKILL)
    {
        return false;
    }

    uint32 skill = spellInfo->EffectMiscValue[EFFECT_INDEX_1];

    return IsProfessionOrRidingSkill(skill);
}

bool SpellMgr::IsProfessionSpell(uint32 spellId)
{
    SpellEntry const* spellInfo = sSpellStore.LookupEntry(spellId);
    if (!spellInfo)
    {
        return false;
    }

    if (spellInfo->Effect[EFFECT_INDEX_1] != SPELL_EFFECT_SKILL)
    {
        return false;
    }

    uint32 skill = spellInfo->EffectMiscValue[EFFECT_INDEX_1];

    return IsProfessionSkill(skill);
}

bool SpellMgr::IsPrimaryProfessionSpell(uint32 spellId)
{
    SpellEntry const* spellInfo = sSpellStore.LookupEntry(spellId);
    if (!spellInfo)
    {
        return false;
    }

    if (spellInfo->Effect[EFFECT_INDEX_1] != SPELL_EFFECT_SKILL)
    {
        return false;
    }

    uint32 skill = spellInfo->EffectMiscValue[EFFECT_INDEX_1];

    return IsPrimaryProfessionSkill(skill);
}

bool SpellMgr::IsPrimaryProfessionFirstRankSpell(uint32 spellId) const
{
    return IsPrimaryProfessionSpell(spellId) && GetSpellRank(spellId) == 1;
}

bool SpellMgr::IsSkillBonusSpell(uint32 spellId) const
{
    SkillLineAbilityMapBounds bounds = GetSkillLineAbilityMapBounds(spellId);

    for (SkillLineAbilityMap::const_iterator _spell_idx = bounds.first; _spell_idx != bounds.second; ++_spell_idx)
    {
        SkillLineAbilityEntry const* pAbility = _spell_idx->second;
        if (!pAbility || pAbility->learnOnGetSkill != ABILITY_LEARNED_ON_GET_PROFESSION_SKILL)
        {
            continue;
        }

        if (pAbility->req_skill_value > 0)
        {
            return true;
        }
    }

    return false;
}

SpellEntry const* SpellMgr::SelectAuraRankForLevel(SpellEntry const* spellInfo, uint32 level) const
{
    // fast case
    if (level + 10 >= spellInfo->spellLevel)
    {
        return spellInfo;
    }

    // ignore selection for passive spells
    if (IsPassiveSpell(spellInfo))
    {
        return spellInfo;
    }

    bool needRankSelection = false;
    for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
    {
        // for simple aura in check apply to any non caster based targets, in rank search mode to any explicit targets
        if (((spellInfo->Effect[i] == SPELL_EFFECT_APPLY_AURA &&
              (IsExplicitPositiveTarget(spellInfo->EffectImplicitTargetA[i]) ||
               IsAreaEffectPossitiveTarget(Targets(spellInfo->EffectImplicitTargetA[i])))) ||
             spellInfo->Effect[i] == SPELL_EFFECT_APPLY_AREA_AURA_PARTY) &&
            IsPositiveEffect(spellInfo, SpellEffectIndex(i)))
        {
            needRankSelection = true;
            break;
        }
    }

    // not required (rank check more slow so check it here)
    if (!needRankSelection || GetSpellRank(spellInfo->Id) == 0)
    {
        return spellInfo;
    }

    for (uint32 nextSpellId = spellInfo->Id; nextSpellId != 0; nextSpellId = GetPrevSpellInChain(nextSpellId))
    {
        SpellEntry const* nextSpellInfo = sSpellStore.LookupEntry(nextSpellId);
        if (!nextSpellInfo)
        {
            break;
        }

        // if found appropriate level
        if (level + 10 >= nextSpellInfo->spellLevel)
        {
            return nextSpellInfo;
        }

        // one rank less then
    }

    // not found
    return NULL;
}

typedef UNORDERED_MAP<uint32, uint32> AbilitySpellPrevMap;

static void LoadSpellChains_AbilityHelper(SpellChainMap& chainMap, AbilitySpellPrevMap const& prevRanks, uint32 spell_id, uint32 prev_id, uint32 deep = 30)
{
    // spell already listed in chains store
    SpellChainMap::const_iterator chain_itr = chainMap.find(spell_id);
    if (chain_itr != chainMap.end())
    {
        MANGOS_ASSERT(chain_itr->second.prev == prev_id);       // LoadSpellChains_AbilityHelper: Conflicting data in talents or spell abilities dbc
        return;
    }

    // prev rank listed in main chain table (can fill correct data directly)
    SpellChainMap::const_iterator prev_chain_itr = chainMap.find(prev_id);
    if (prev_chain_itr != chainMap.end())
    {
        SpellChainNode node;
        node.prev  = prev_id;
        node.first = prev_chain_itr->second.first;
        node.rank  = prev_chain_itr->second.rank + 1;
        node.req   = 0;
        chainMap[spell_id] = node;
        return;
    }

    // prev spell not listed in prev ranks store, so it first rank
    AbilitySpellPrevMap::const_iterator prev_itr = prevRanks.find(prev_id);
    if (prev_itr == prevRanks.end())
    {
        SpellChainNode prev_node;
        prev_node.prev  = 0;
        prev_node.first = prev_id;
        prev_node.rank  = 1;
        prev_node.req   = 0;
        chainMap[prev_id] = prev_node;

        SpellChainNode node;
        node.prev  = prev_id;
        node.first = prev_id;
        node.rank  = 2;
        node.req   = 0;
        chainMap[spell_id] = node;
        return;
    }

    if (deep == 0)
    {
        MANGOS_ASSERT(false && "LoadSpellChains_AbilityHelper: Infinity cycle in spell ability data");
        return;
    }

    // prev rank listed, so process it first
    LoadSpellChains_AbilityHelper(chainMap, prevRanks, prev_id, prev_itr->second, deep - 1);

    // prev rank must be listed now
    prev_chain_itr = chainMap.find(prev_id);
    if (prev_chain_itr == chainMap.end())
    {
        return;
    }

    SpellChainNode node;
    node.prev  = prev_id;
    node.first = prev_chain_itr->second.first;
    node.rank  = prev_chain_itr->second.rank + 1;
    node.req   = 0;
    chainMap[spell_id] = node;
}

void SpellMgr::LoadSpellChains()
{
    mSpellChains.clear();                                   // need for reload case
    mSpellChainsNext.clear();                               // need for reload case

    // load known data for talents
    for (unsigned int i = 0; i < sTalentStore.GetNumRows(); ++i)
    {
        TalentEntry const* talentInfo = sTalentStore.LookupEntry(i);
        if (!talentInfo)
        {
            continue;
        }

        // not add ranks for 1 ranks talents (if exist non ranks spells then it will included in table data)
        if (!talentInfo->RankID[1])
        {
            continue;
        }

        for (int j = 0; j < MAX_TALENT_RANK; ++j)
        {
            uint32 spell_id = talentInfo->RankID[j];
            if (!spell_id)
            {
                continue;
            }

            if (!sSpellStore.LookupEntry(spell_id))
            {
                // sLog.outErrorDb("Talent %u not exist as spell",spell_id);
                continue;
            }

            SpellChainNode node;
            node.prev  = (j > 0) ? talentInfo->RankID[j - 1] : 0;
            node.first = talentInfo->RankID[0];
            node.rank  = j + 1;
            node.req   = 0;

            mSpellChains[spell_id] = node;
        }
    }

    // load known data from spell abilities
    {
        // we can calculate ranks only after full data generation
        AbilitySpellPrevMap prevRanks;
        for (SkillLineAbilityMap::const_iterator ab_itr = mSkillLineAbilityMap.begin(); ab_itr != mSkillLineAbilityMap.end(); ++ab_itr)
        {
            uint32 spell_id = ab_itr->first;

            // some forward spells not exist and can be ignored (some outdated data)
            SpellEntry const* spell_entry = sSpellStore.LookupEntry(spell_id);
            if (!spell_entry)                               // no cases
            {
                continue;
            }

            // ignore spell without forwards (non ranked or missing info in skill abilities)
            uint32 forward_id = ab_itr->second->forward_spellid;

            // by some strange reason < 3.x clients not have forward spell for 2366
            if (spell_id == 2366)                           // Herb Gathering, Apprentice
            {
                forward_id = 2368;
            }

            if (!forward_id)
            {
                continue;
            }

            // some forward spells not exist and can be ignored (some outdated data)
            SpellEntry const* forward_entry = sSpellStore.LookupEntry(forward_id);
            if (!forward_entry)
            {
                continue;
            }

            // some forward spells still exist but excluded from real use as ranks and not listed in skill abilities now
            SkillLineAbilityMapBounds bounds = mSkillLineAbilityMap.equal_range(forward_id);
            if (bounds.first == bounds.second)
            {
                continue;
            }

            // spell already listed in chains store
            SpellChainMap::const_iterator chain_itr = mSpellChains.find(forward_id);
            if (chain_itr != mSpellChains.end())
            {
                MANGOS_ASSERT(chain_itr->second.prev == spell_id);      // Conflicting data in talents or spell abilities dbc
                continue;
            }

            // spell already listed in prev ranks store
            AbilitySpellPrevMap::const_iterator prev_itr = prevRanks.find(forward_id);
            if (prev_itr != prevRanks.end())
            {
                MANGOS_ASSERT(prev_itr->second == spell_id);            // Conflicting data in talents or spell abilities dbc
                continue;
            }

            // prev rank listed in main chain table (can fill correct data directly)
            SpellChainMap::const_iterator prev_chain_itr = mSpellChains.find(spell_id);
            if (prev_chain_itr != mSpellChains.end())
            {
                SpellChainNode node;
                node.prev  = spell_id;
                node.first = prev_chain_itr->second.first;
                node.rank  = prev_chain_itr->second.rank + 1;
                node.req   = 0;

                mSpellChains[forward_id] = node;
                continue;
            }

            // need temporary store for later rank calculation
            prevRanks[forward_id] = spell_id;
        }

        while (!prevRanks.empty())
        {
            uint32 spell_id = prevRanks.begin()->first;
            uint32 prev_id  = prevRanks.begin()->second;
            prevRanks.erase(prevRanks.begin());

            LoadSpellChains_AbilityHelper(mSpellChains, prevRanks, spell_id, prev_id);
        }
    }

    // load custom case
    QueryResult* result = WorldDatabase.Query("SELECT `spell_id`, `prev_spell`, `first_spell`, `rank`, `req_spell` FROM `spell_chain`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();

        sLog.outString(">> Loaded 0 spell chain records");
        sLog.outErrorDb("`spell_chains` table is empty!");
        sLog.outString();
        return;
    }

    uint32 dbc_count = mSpellChains.size();
    uint32 new_count = 0;
    uint32 req_count = 0;

    BarGoLink bar(result->GetRowCount());
    do
    {
        bar.step();
        Field* fields = result->Fetch();

        uint32 spell_id = fields[0].GetUInt32();

        SpellChainNode node;
        node.prev  = fields[1].GetUInt32();
        node.first = fields[2].GetUInt32();
        node.rank  = fields[3].GetUInt8();
        node.req   = fields[4].GetUInt32();

        if (!sSpellStore.LookupEntry(spell_id))
        {
            sLog.outErrorDb("Spell %u listed in `spell_chain` does not exist", spell_id);
            continue;
        }

        SpellChainMap::iterator chain_itr = mSpellChains.find(spell_id);
        if (chain_itr != mSpellChains.end())
        {
            if (chain_itr->second.rank != node.rank)
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` expected rank %u by DBC data.",
                                spell_id, node.prev, node.first, node.rank, node.req, chain_itr->second.rank);
                continue;
            }

            if (chain_itr->second.prev != node.prev)
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` expected prev %u by DBC data.",
                                spell_id, node.prev, node.first, node.rank, node.req, chain_itr->second.prev);
                continue;
            }

            if (chain_itr->second.first != node.first)
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` expected first %u by DBC data.",
                                spell_id, node.prev, node.first, node.rank, node.req, chain_itr->second.first);
                continue;
            }

            // update req field by table data
            if (node.req)
            {
                chain_itr->second.req = node.req;
                ++req_count;
                continue;
            }

            // in other case redundant
            sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) already added (talent or spell ability with forward) and non need in `spell_chain`",
                            spell_id, node.prev, node.first, node.rank, node.req);
            continue;
        }

        if (node.prev != 0 && !sSpellStore.LookupEntry(node.prev))
        {
            sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has nonexistent previous rank spell.",
                            spell_id, node.prev, node.first, node.rank, node.req);
            continue;
        }

        if (!sSpellStore.LookupEntry(node.first))
        {
            sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has not existing first rank spell.",
                            spell_id, node.prev, node.first, node.rank, node.req);
            continue;
        }

        // check basic spell chain data integrity (note: rank can be equal 0 or 1 for first/single spell)
        if ((spell_id == node.first) != (node.rank <= 1) ||
            (spell_id == node.first) != (node.prev == 0) ||
            (node.rank <= 1) != (node.prev == 0))
        {
            sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has not compatible chain data.",
                            spell_id, node.prev, node.first, node.rank, node.req);
            continue;
        }

        if (node.req != 0 && !sSpellStore.LookupEntry(node.req))
        {
            sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has not existing required spell.",
                            spell_id, node.prev, node.first, node.rank, node.req);
            continue;
        }

        // talents not required data in spell chain for work, but must be checked if present for integrity
        if (TalentSpellPos const* pos = GetTalentSpellPos(spell_id))
        {
            if (node.rank != pos->rank + 1)
            {
                sLog.outErrorDb("Talent %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has wrong rank.",
                                spell_id, node.prev, node.first, node.rank, node.req);
                continue;
            }

            if (TalentEntry const* talentEntry = sTalentStore.LookupEntry(pos->talent_id))
            {
                if (node.first != talentEntry->RankID[0])
                {
                    sLog.outErrorDb("Talent %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has wrong first rank spell.",
                                    spell_id, node.prev, node.first, node.rank, node.req);
                    continue;
                }

                if (node.rank > 1 && node.prev != talentEntry->RankID[node.rank - 1 - 1])
                {
                    sLog.outErrorDb("Talent %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has wrong prev rank spell.",
                                    spell_id, node.prev, node.first, node.rank, node.req);
                    continue;
                }

                if (node.req != talentEntry->DependsOnSpell)
                {
                    sLog.outErrorDb("Talent %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has wrong required spell.",
                                    spell_id, node.prev, node.first, node.rank, node.req);
                    continue;
                }
            }
        }

        mSpellChains[spell_id] = node;

        ++new_count;
    }
    while (result->NextRow());

    delete result;

    // additional integrity checks
    for (SpellChainMap::const_iterator i = mSpellChains.begin(); i != mSpellChains.end(); ++i)
    {
        if (i->second.prev)
        {
            SpellChainMap::const_iterator i_prev = mSpellChains.find(i->second.prev);
            if (i_prev == mSpellChains.end())
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has not found previous rank spell in table.",
                                i->first, i->second.prev, i->second.first, i->second.rank, i->second.req);
            }
            else if (i_prev->second.first != i->second.first)
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has different first spell in chain compared to previous rank spell (prev: %u, first: %u, rank: %d, req: %u).",
                                i->first, i->second.prev, i->second.first, i->second.rank, i->second.req,
                                i_prev->second.prev, i_prev->second.first, i_prev->second.rank, i_prev->second.req);
            }
            else if (i_prev->second.rank + 1 != i->second.rank)
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has different rank compared to previous rank spell (prev: %u, first: %u, rank: %d, req: %u).",
                                i->first, i->second.prev, i->second.first, i->second.rank, i->second.req,
                                i_prev->second.prev, i_prev->second.first, i_prev->second.rank, i_prev->second.req);
            }
        }

        if (i->second.req)
        {
            SpellChainMap::const_iterator i_req = mSpellChains.find(i->second.req);
            if (i_req == mSpellChains.end())
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has not found required rank spell in table.",
                                i->first, i->second.prev, i->second.first, i->second.rank, i->second.req);
            }
            else if (i_req->second.first == i->second.first)
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has required rank spell from same spell chain (prev: %u, first: %u, rank: %d, req: %u).",
                                i->first, i->second.prev, i->second.first, i->second.rank, i->second.req,
                                i_req->second.prev, i_req->second.first, i_req->second.rank, i_req->second.req);
            }
            else if (i_req->second.req)
            {
                sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has required rank spell with required spell (prev: %u, first: %u, rank: %d, req: %u).",
                                i->first, i->second.prev, i->second.first, i->second.rank, i->second.req,
                                i_req->second.prev, i_req->second.first, i_req->second.rank, i_req->second.req);
            }
        }
    }

    // fill next rank cache
    for (SpellChainMap::const_iterator i = mSpellChains.begin(); i != mSpellChains.end(); ++i)
    {
        uint32 spell_id = i->first;
        SpellChainNode const& node = i->second;

        if (node.prev)
        {
            mSpellChainsNext.insert(SpellChainMapNext::value_type(node.prev, spell_id));
        }

        if (node.req)
        {
            mSpellChainsNext.insert(SpellChainMapNext::value_type(node.req, spell_id));
        }
    }

    // check single rank redundant cases (single rank talents not added by default so this can be only custom cases)
    for (SpellChainMap::const_iterator i = mSpellChains.begin(); i != mSpellChains.end(); ++i)
    {
        // skip non-first ranks, and spells with additional reqs
        if (i->second.rank > 1 || i->second.req)
        {
            continue;
        }

        if (mSpellChainsNext.find(i->first) == mSpellChainsNext.end())
        {
            sLog.outErrorDb("Spell %u (prev: %u, first: %u, rank: %d, req: %u) listed in `spell_chain` has single rank data, so redundant.",
                            i->first, i->second.prev, i->second.first, i->second.rank, i->second.req);
        }
    }

    sLog.outString(">> Loaded %u spell chain records (%u from DBC data with %u req field updates, and %u loaded from table)", dbc_count + new_count, dbc_count, req_count, new_count);
    sLog.outString();
}

void SpellMgr::LoadSpellLearnSkills()
{
    mSpellLearnSkills.clear();                              // need for reload case

    // search auto-learned skills and add its to map also for use in unlearn spells/talents
    uint32 dbc_count = 0;
    BarGoLink bar(sSpellStore.GetNumRows());
    for (uint32 spell = 0; spell < sSpellStore.GetNumRows(); ++spell)
    {
        bar.step();
        SpellEntry const* entry = sSpellStore.LookupEntry(spell);

        if (!entry)
        {
            continue;
        }

        for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
        {
            if (entry->Effect[i] == SPELL_EFFECT_SKILL)
            {
                SpellLearnSkillNode dbc_node;
                dbc_node.skill    = entry->EffectMiscValue[i];
                dbc_node.step     = entry->CalculateSimpleValue(SpellEffectIndex(i));
                if (dbc_node.skill != SKILL_RIDING)
                {
                    dbc_node.value = 1;
                }
                else
                {
                    dbc_node.value = dbc_node.step * 75;
                }
                dbc_node.maxvalue = dbc_node.step * 75;

                mSpellLearnSkills[spell] = dbc_node;
                ++dbc_count;
                break;
            }
        }
    }

    sLog.outString(">> Loaded %u Spell Learn Skills from DBC", dbc_count);
    sLog.outString();
}

void SpellMgr::LoadSpellLearnSpells()
{
    mSpellLearnSpells.clear();                              // need for reload case

    //                                                0      1        2
    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `SpellID`, `Active` FROM `spell_learn_spell`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();

        sLog.outString();
        sLog.outString(">> Loaded 0 spell learn spells");
        sLog.outErrorDb("`spell_learn_spell` table is empty!");
        return;
    }

    uint32 count = 0;

    BarGoLink bar(result->GetRowCount());
    do
    {
        bar.step();
        Field* fields = result->Fetch();

        uint32 spell_id    = fields[0].GetUInt32();

        SpellLearnSpellNode node;
        node.spell      = fields[1].GetUInt32();
        node.active     = fields[2].GetBool();
        node.autoLearned = false;

        if (!sSpellStore.LookupEntry(spell_id))
        {
            sLog.outErrorDb("Spell %u listed in `spell_learn_spell` does not exist", spell_id);
            continue;
        }

        if (!sSpellStore.LookupEntry(node.spell))
        {
            sLog.outErrorDb("Spell %u listed in `spell_learn_spell` learning nonexistent spell %u", spell_id, node.spell);
            continue;
        }

        if (GetTalentSpellCost(node.spell))
        {
            sLog.outErrorDb("Spell %u listed in `spell_learn_spell` attempt learning talent spell %u, skipped", spell_id, node.spell);
            continue;
        }

        mSpellLearnSpells.insert(SpellLearnSpellMap::value_type(spell_id, node));

        ++count;
    }
    while (result->NextRow());

    delete result;

    // search auto-learned spells and add its to map also for use in unlearn spells/talents
    uint32 dbc_count = 0;
    for (uint32 spell = 0; spell < sSpellStore.GetNumRows(); ++spell)
    {
        SpellEntry const* entry = sSpellStore.LookupEntry(spell);

        if (!entry)
        {
            continue;
        }

        for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
        {
            if (entry->Effect[i] == SPELL_EFFECT_LEARN_SPELL)
            {
                SpellLearnSpellNode dbc_node;
                dbc_node.spell       = entry->EffectTriggerSpell[i];
                dbc_node.active      = true;                // all dbc based learned spells is active (show in spell book or hide by client itself)

                // ignore learning nonexistent spells (broken/outdated/or generic learning spell 483
                if (!sSpellStore.LookupEntry(dbc_node.spell))
                {
                    continue;
                }

                // talent or passive spells or skill-step spells auto-casted and not need dependent learning,
                // pet teaching spells don't must be dependent learning (casted)
                // other required explicit dependent learning
                dbc_node.autoLearned = entry->EffectImplicitTargetA[i] == TARGET_PET || GetTalentSpellCost(spell) > 0 || IsPassiveSpell(entry) || entry->HasSpellEffect(SPELL_EFFECT_SKILL_STEP);

                SpellLearnSpellMapBounds db_node_bounds = GetSpellLearnSpellMapBounds(spell);

                bool found = false;
                for (SpellLearnSpellMap::const_iterator itr = db_node_bounds.first; itr != db_node_bounds.second; ++itr)
                {
                    if (itr->second.spell == dbc_node.spell)
                    {
                        sLog.outErrorDb("Spell %u auto-learn spell %u in spell.dbc then the record in `spell_learn_spell` is redundant, please fix DB.",
                                        spell, dbc_node.spell);
                        found = true;
                        break;
                    }
                }

                if (!found)                                 // add new spell-spell pair if not found
                {
                    mSpellLearnSpells.insert(SpellLearnSpellMap::value_type(spell, dbc_node));
                    ++dbc_count;
                }
            }
        }
    }

    sLog.outString(">> Loaded %u spell learn spells + %u found in DBC", count, dbc_count);
    sLog.outString();
}

void SpellMgr::LoadSpellScriptTarget()
{
    sSpellScriptTargetStorage.Load();

    // Check content
    for (SQLMultiStorage::SQLSIterator<SpellTargetEntry> itr = sSpellScriptTargetStorage.getDataBegin<SpellTargetEntry>(); itr < sSpellScriptTargetStorage.getDataEnd<SpellTargetEntry>(); ++itr)
    {
        SpellEntry const* spellProto = sSpellStore.LookupEntry(itr->spellId);
        if (!spellProto)
        {
            sLog.outErrorDb("Table `spell_script_target`: spellId %u listed for TargetEntry %u does not exist.", itr->spellId, itr->targetEntry);
            sSpellScriptTargetStorage.EraseEntry(itr->spellId);
            continue;
        }

        bool targetfound = false;
        for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
        {
            if (spellProto->EffectImplicitTargetA[i] == TARGET_SCRIPT ||
                spellProto->EffectImplicitTargetB[i] == TARGET_SCRIPT ||
                spellProto->EffectImplicitTargetA[i] == TARGET_SCRIPT_COORDINATES ||
                spellProto->EffectImplicitTargetB[i] == TARGET_SCRIPT_COORDINATES ||
                spellProto->EffectImplicitTargetA[i] == TARGET_FOCUS_OR_SCRIPTED_GAMEOBJECT ||
                spellProto->EffectImplicitTargetB[i] == TARGET_FOCUS_OR_SCRIPTED_GAMEOBJECT ||
                spellProto->EffectImplicitTargetA[i] == TARGET_AREAEFFECT_INSTANT ||
                spellProto->EffectImplicitTargetB[i] == TARGET_AREAEFFECT_INSTANT ||
                spellProto->EffectImplicitTargetA[i] == TARGET_AREAEFFECT_CUSTOM ||
                spellProto->EffectImplicitTargetB[i] == TARGET_AREAEFFECT_CUSTOM ||
                spellProto->EffectImplicitTargetA[i] == TARGET_AREAEFFECT_GO_AROUND_SOURCE ||
                spellProto->EffectImplicitTargetB[i] == TARGET_AREAEFFECT_GO_AROUND_SOURCE ||
                spellProto->EffectImplicitTargetA[i] == TARGET_AREAEFFECT_GO_AROUND_DEST ||
                spellProto->EffectImplicitTargetB[i] == TARGET_AREAEFFECT_GO_AROUND_DEST ||
                spellProto->EffectImplicitTargetA[i] == TARGET_NARROW_FRONTAL_CONE ||
                spellProto->EffectImplicitTargetB[i] == TARGET_NARROW_FRONTAL_CONE)
            {
                targetfound = true;
                break;
            }
        }
        if (!targetfound)
        {
            sLog.outErrorDb("Table `spell_script_target`: spellId %u listed for TargetEntry %u does not have any implicit target TARGET_SCRIPT(38) or TARGET_SCRIPT_COORDINATES (46) or TARGET_FOCUS_OR_SCRIPTED_GAMEOBJECT (40).", itr->spellId, itr->targetEntry);
            sSpellScriptTargetStorage.EraseEntry(itr->spellId);
            continue;
        }

        if (itr->type >= MAX_SPELL_TARGET_TYPE)
        {
            sLog.outErrorDb("Table `spell_script_target`: target type %u for TargetEntry %u is incorrect.", itr->type, itr->targetEntry);
            sSpellScriptTargetStorage.EraseEntry(itr->spellId);
            continue;
        }

        // Checks by target type
        switch (itr->type)
        {
            case SPELL_TARGET_TYPE_GAMEOBJECT:
            {
                if (!itr->targetEntry)
                {
                    break;
                }

                if (!sGOStorage.LookupEntry<GameObjectInfo>(itr->targetEntry))
                {
                    sLog.outErrorDb("Table `spell_script_target`: gameobject template entry %u does not exist.", itr->targetEntry);
                    sSpellScriptTargetStorage.EraseEntry(itr->spellId);
                    continue;
                }
                break;
            }
            default:
                if (!itr->targetEntry)
                {
                    sLog.outErrorDb("Table `spell_script_target`: target entry == 0 for not GO target type (%u).", itr->type);
                    sSpellScriptTargetStorage.EraseEntry(itr->spellId);
                    continue;
                }
                if (const CreatureInfo* cInfo = sCreatureStorage.LookupEntry<CreatureInfo>(itr->targetEntry))
                {
                    if (itr->spellId == 30427 && !cInfo->SkinningLootId)
                    {
                        sLog.outErrorDb("Table `spell_script_target` has creature %u as a target of spellid 30427, but this creature has no SkinningLootId. Gas extraction will not work!", cInfo->Entry);
                        sSpellScriptTargetStorage.EraseEntry(itr->spellId);
                        continue;
                    }
                }
                else
                {
                    sLog.outErrorDb("Table `spell_script_target`: creature template entry %u does not exist.", itr->targetEntry);
                    sSpellScriptTargetStorage.EraseEntry(itr->spellId);
                    continue;
                }
                break;
        }
    }

    // Check all spells
    if (!sLog.HasLogFilter(LOG_FILTER_DB_STRICTED_CHECK))
    {
        for (uint32 i = 1; i < sSpellStore.GetNumRows(); ++i)
        {
            SpellEntry const* spellInfo = sSpellStore.LookupEntry(i);
            if (!spellInfo)
            {
                continue;
            }

            for (int j = 0; j < MAX_EFFECT_INDEX; ++j)
            {
                if (spellInfo->Effect[j] && (spellInfo->EffectImplicitTargetA[j] == TARGET_SCRIPT ||
                                             (spellInfo->EffectImplicitTargetA[j] != TARGET_SELF && spellInfo->EffectImplicitTargetB[j] == TARGET_SCRIPT)))
                {
                    SQLMultiStorage::SQLMSIteratorBounds<SpellTargetEntry> bounds = sSpellScriptTargetStorage.getBounds<SpellTargetEntry>(i);
                    if (bounds.first == bounds.second)
                    {
                        sLog.outErrorDb("Spell (ID: %u) has effect EffectImplicitTargetA/EffectImplicitTargetB = %u (TARGET_SCRIPT), but does not have record in `spell_script_target`", spellInfo->Id, TARGET_SCRIPT);
                        break;                              // effects of spell
                    }
                }
            }
        }
    }

    sLog.outString(">> Loaded %u spell_script_target definitions", sSpellScriptTargetStorage.GetRecordCount());
    sLog.outString();
}

void SpellMgr::LoadSpellPetAuras()
{
    mSpellPetAuraMap.clear();                               // need for reload case

    uint32 count = 0;

    //                                                0      1    2
    QueryResult* result = WorldDatabase.Query("SELECT `spell`, `pet`, `aura` FROM `spell_pet_auras`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString(">> Loaded %u spell pet auras", count);
        sLog.outString();
        return;
    }

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 spell = fields[0].GetUInt32();
        uint32 pet = fields[1].GetUInt32();
        uint32 aura = fields[2].GetUInt32();

        SpellPetAuraMap::iterator itr = mSpellPetAuraMap.find(spell);
        if (itr != mSpellPetAuraMap.end())
        {
            itr->second.AddAura(pet, aura);
        }
        else
        {
            SpellEntry const* spellInfo = sSpellStore.LookupEntry(spell);
            if (!spellInfo)
            {
                sLog.outErrorDb("Spell %u listed in `spell_pet_auras` does not exist", spell);
                continue;
            }
            int i = 0;
            for (; i < MAX_EFFECT_INDEX; ++i)
                if ((spellInfo->Effect[i] == SPELL_EFFECT_APPLY_AURA &&
                     spellInfo->EffectApplyAuraName[i] == SPELL_AURA_DUMMY) ||
                    spellInfo->Effect[i] == SPELL_EFFECT_DUMMY)
                    {
                        break;
                    }

            if (i == MAX_EFFECT_INDEX)
            {
                sLog.outError("Spell %u listed in `spell_pet_auras` does not have dummy aura or dummy effect", spell);
                continue;
            }

            SpellEntry const* spellInfo2 = sSpellStore.LookupEntry(aura);
            if (!spellInfo2)
            {
                sLog.outErrorDb("Aura %u listed in `spell_pet_auras` does not exist", aura);
                continue;
            }

            PetAura pa(pet, aura, spellInfo->EffectImplicitTargetA[i] == TARGET_PET, spellInfo->CalculateSimpleValue(SpellEffectIndex(i)));
            mSpellPetAuraMap[spell] = pa;
        }

        ++count;
    }
    while (result->NextRow());

    delete result;

    sLog.outString(">> Loaded %u spell pet auras", count);
    sLog.outString();
}

/// Some checks for spells, to prevent adding deprecated/broken spells for trainers, spell book, etc
bool SpellMgr::IsSpellValid(SpellEntry const* spellInfo, Player* pl, bool msg)
{
    // not exist
    if (!spellInfo)
    {
        return false;
    }

    bool need_check_reagents = false;

    // check effects
    for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
    {
        switch (spellInfo->Effect[i])
        {
            case SPELL_EFFECT_NONE:
                continue;

                // craft spell for crafting nonexistent item (break client recipes list show)
            case SPELL_EFFECT_CREATE_ITEM:
            {
                if (!ObjectMgr::GetItemPrototype(spellInfo->EffectItemType[i]))
                {
                    if (msg)
                    {
                        if (pl)
                        {
                            ChatHandler(pl).PSendSysMessage("Craft spell %u create item (Entry: %u) but item does not exist in item_template.", spellInfo->Id, spellInfo->EffectItemType[i]);
                        }
                        else
                        {
                            sLog.outErrorDb("Craft spell %u create item (Entry: %u) but item does not exist in item_template.", spellInfo->Id, spellInfo->EffectItemType[i]);
                        }
                    }
                    return false;
                }

                need_check_reagents = true;
                break;
            }
            case SPELL_EFFECT_LEARN_SPELL:
            {
                SpellEntry const* spellInfo2 = sSpellStore.LookupEntry(spellInfo->EffectTriggerSpell[i]);
                if (!IsSpellValid(spellInfo2, pl, msg))
                {
                    if (msg)
                    {
                        if (pl)
                        {
                            ChatHandler(pl).PSendSysMessage("Spell %u learn to broken spell %u, and then...", spellInfo->Id, spellInfo->EffectTriggerSpell[i]);
                        }
                        else
                        {
                            sLog.outErrorDb("Spell %u learn to invalid spell %u, and then...", spellInfo->Id, spellInfo->EffectTriggerSpell[i]);
                        }
                    }
                    return false;
                }
                break;
            }
        }
    }

    if (need_check_reagents)
    {
        for (int j = 0; j < MAX_SPELL_REAGENTS; ++j)
        {
            if (spellInfo->Reagent[j] > 0 && !ObjectMgr::GetItemPrototype(spellInfo->Reagent[j]))
            {
                if (msg)
                {
                    if (pl)
                    {
                        ChatHandler(pl).PSendSysMessage("Craft spell %u requires reagent item (Entry: %u) but item does not exist in item_template.", spellInfo->Id, spellInfo->Reagent[j]);
                    }
                    else
                    {
                        sLog.outErrorDb("Craft spell %u requires reagent item (Entry: %u) but item does not exist in item_template.", spellInfo->Id, spellInfo->Reagent[j]);
                    }
                }
                return false;
            }
        }
    }

    return true;
}

void SpellMgr::LoadSpellAreas()
{
    mSpellAreaMap.clear();                                  // need for reload case
    mSpellAreaForAuraMap.clear();

    uint32 count = 0;

    //                                                0      1     2            3                   4          5             6           7         8       9
    QueryResult* result = WorldDatabase.Query("SELECT `spell`, `area`, `quest_start`, `quest_start_active`, `quest_end`, `condition_id`, `aura_spell`, `racemask`, `gender`, `autocast` FROM `spell_area`");

    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString(">> Loaded %u spell area requirements", count);
        sLog.outString();
        return;
    }

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 spell = fields[0].GetUInt32();
        SpellArea spellArea;
        spellArea.spellId             = spell;
        spellArea.areaId              = fields[1].GetUInt32();
        spellArea.questStart          = fields[2].GetUInt32();
        spellArea.questStartCanActive = fields[3].GetBool();
        spellArea.questEnd            = fields[4].GetUInt32();
        spellArea.conditionId         = fields[5].GetUInt16();
        spellArea.auraSpell           = fields[6].GetInt32();
        spellArea.raceMask            = fields[7].GetUInt32();
        spellArea.gender              = Gender(fields[8].GetUInt8());
        spellArea.autocast            = fields[9].GetBool();

        if (!sSpellStore.LookupEntry(spell))
        {
            sLog.outErrorDb("Spell %u listed in `spell_area` does not exist", spell);
            continue;
        }

        {
            bool ok = true;
            SpellAreaMapBounds sa_bounds = GetSpellAreaMapBounds(spellArea.spellId);
            for (SpellAreaMap::const_iterator itr = sa_bounds.first; itr != sa_bounds.second; ++itr)
            {
                if (spellArea.spellId != itr->second.spellId)
                {
                    continue;
                }
                if (spellArea.areaId != itr->second.areaId)
                {
                    continue;
                }
                if (spellArea.questStart != itr->second.questStart)
                {
                    continue;
                }
                if (spellArea.auraSpell != itr->second.auraSpell)
                {
                    continue;
                }
                if ((spellArea.raceMask & itr->second.raceMask) == 0)
                {
                    continue;
                }
                if (spellArea.gender != itr->second.gender)
                {
                    continue;
                }

                // duplicate by requirements
                ok = false;
                break;
            }

            if (!ok)
            {
                sLog.outErrorDb("Spell %u listed in `spell_area` already listed with similar requirements.", spell);
                continue;
            }
        }

        if (spellArea.areaId && !GetAreaEntryByAreaID(spellArea.areaId))
        {
            sLog.outErrorDb("Spell %u listed in `spell_area` have wrong area (%u) requirement", spell, spellArea.areaId);
            continue;
        }

        if (spellArea.conditionId && !sConditionStorage.LookupEntry<PlayerCondition>(spellArea.conditionId))
        {
            sLog.outErrorDb("Spell %u listed in `spell_area` have wrong conditionId (%u) requirement", spell, spellArea.conditionId);
            continue;
        }
        else if (!spellArea.conditionId)
        {
            if (spellArea.questStart && !sObjectMgr.GetQuestTemplate(spellArea.questStart))
            {
                sLog.outErrorDb("Spell %u listed in `spell_area` have wrong start quest (%u) requirement", spell, spellArea.questStart);
                continue;
            }

            if (spellArea.questEnd)
            {
                if (!sObjectMgr.GetQuestTemplate(spellArea.questEnd))
                {
                    sLog.outErrorDb("Spell %u listed in `spell_area` have wrong end quest (%u) requirement", spell, spellArea.questEnd);
                    continue;
                }

                if (spellArea.questEnd == spellArea.questStart && !spellArea.questStartCanActive)
                {
                    sLog.outErrorDb("Spell %u listed in `spell_area` have quest (%u) requirement for start and end in same time", spell, spellArea.questEnd);
                    continue;
                }
            }

            if (spellArea.raceMask && (spellArea.raceMask & RACEMASK_ALL_PLAYABLE) == 0)
            {
                sLog.outErrorDb("Spell %u listed in `spell_area` have wrong race mask (%u) requirement", spell, spellArea.raceMask);
                continue;
            }

            if (spellArea.gender != GENDER_NONE && spellArea.gender != GENDER_FEMALE && spellArea.gender != GENDER_MALE)
            {
                sLog.outErrorDb("Spell %u listed in `spell_area` have wrong gender (%u) requirement", spell, spellArea.gender);
                continue;
            }
        }

        if (spellArea.auraSpell)
        {
            SpellEntry const* spellInfo = sSpellStore.LookupEntry(abs(spellArea.auraSpell));
            if (!spellInfo)
            {
                sLog.outErrorDb("Spell %u listed in `spell_area` have wrong aura spell (%u) requirement", spell, abs(spellArea.auraSpell));
                continue;
            }

            switch (spellInfo->EffectApplyAuraName[EFFECT_INDEX_0])
            {
                case SPELL_AURA_DUMMY:
                case SPELL_AURA_GHOST:
                    break;
                default:
                    sLog.outErrorDb("Spell %u listed in `spell_area` have aura spell requirement (%u) without dummy/phase/ghost aura in effect 0", spell, abs(spellArea.auraSpell));
                    continue;
            }

            if (uint32(abs(spellArea.auraSpell)) == spellArea.spellId)
            {
                sLog.outErrorDb("Spell %u listed in `spell_area` have aura spell (%u) requirement for itself", spell, abs(spellArea.auraSpell));
                continue;
            }

            // not allow autocast chains by auraSpell field (but allow use as alternative if not present)
            if (spellArea.autocast && spellArea.auraSpell > 0)
            {
                bool chain = false;
                SpellAreaForAuraMapBounds saBound = GetSpellAreaForAuraMapBounds(spellArea.spellId);
                for (SpellAreaForAuraMap::const_iterator itr = saBound.first; itr != saBound.second; ++itr)
                {
                    if (itr->second->autocast && itr->second->auraSpell > 0)
                    {
                        chain = true;
                        break;
                    }
                }

                if (chain)
                {
                    sLog.outErrorDb("Spell %u listed in `spell_area` have aura spell (%u) requirement that itself autocast from aura", spell, spellArea.auraSpell);
                    continue;
                }

                SpellAreaMapBounds saBound2 = GetSpellAreaMapBounds(spellArea.auraSpell);
                for (SpellAreaMap::const_iterator itr2 = saBound2.first; itr2 != saBound2.second; ++itr2)
                {
                    if (itr2->second.autocast && itr2->second.auraSpell > 0)
                    {
                        chain = true;
                        break;
                    }
                }

                if (chain)
                {
                    sLog.outErrorDb("Spell %u listed in `spell_area` have aura spell (%u) requirement that itself autocast from aura", spell, spellArea.auraSpell);
                    continue;
                }
            }
        }

        SpellArea const* sa = &mSpellAreaMap.insert(SpellAreaMap::value_type(spell, spellArea))->second;

        // for search by current zone/subzone at zone/subzone change
        if (spellArea.areaId)
        {
            mSpellAreaForAreaMap.insert(SpellAreaForAreaMap::value_type(spellArea.areaId, sa));
        }

        // for search at aura apply
        if (spellArea.auraSpell)
        {
            mSpellAreaForAuraMap.insert(SpellAreaForAuraMap::value_type(abs(spellArea.auraSpell), sa));
        }

        ++count;
    }
    while (result->NextRow());

    delete result;

    sLog.outString(">> Loaded %u spell area requirements", count);
    sLog.outString();
}

SpellCastResult SpellMgr::GetSpellAllowedInLocationError(SpellEntry const* spellInfo, uint32 map_id, uint32 zone_id, uint32 area_id, Player const* player)
{
    // DB base check (if non empty then must fit at least single for allow)
    SpellAreaMapBounds saBounds = GetSpellAreaMapBounds(spellInfo->Id);
    if (saBounds.first != saBounds.second)
    {
        for (SpellAreaMap::const_iterator itr = saBounds.first; itr != saBounds.second; ++itr)
        {
            if (itr->second.IsFitToRequirements(player, zone_id, area_id))
            {
                return SPELL_CAST_OK;
            }
        }
        return SPELL_FAILED_REQUIRES_AREA;
    }

    // bg spell checks

    // Spell casted only on battleground
    if (spellInfo->HasAttribute(SPELL_ATTR_EX3_BATTLEGROUND))
        if (!player || !player->InBattleGround())
        {
            return SPELL_FAILED_ONLY_BATTLEGROUNDS;
        }

    switch (spellInfo->Id)
    {
            // a trinket in alterac valley allows to teleport to the boss
        case 22564:                                         // recall
        case 22563:                                         // recall
        {
            if (!player)
            {
                return SPELL_FAILED_REQUIRES_AREA;
            }
            BattleGround* bg = player->GetBattleGround();
            return map_id == 30 && bg
                   && bg->GetStatus() != STATUS_WAIT_JOIN ? SPELL_CAST_OK : SPELL_FAILED_REQUIRES_AREA;
        }
        case 23333:                                         // Warsong Flag
        case 23335:                                         // Silverwing Flag
            return map_id == 489 && player && player->InBattleGround() ? SPELL_CAST_OK : SPELL_FAILED_REQUIRES_AREA;
        case 2584:                                          // Waiting to Resurrect
        {
            return player && player->InBattleGround() ? SPELL_CAST_OK : SPELL_FAILED_ONLY_BATTLEGROUNDS;
        }
        case 22011:                                         // Spirit Heal Channel
        case 22012:                                         // Spirit Heal
        case 24171:                                         // Resurrection Impact Visual
        {
            MapEntry const* mapEntry = sMapStore.LookupEntry(map_id);
            if (!mapEntry)
            {
                return SPELL_FAILED_REQUIRES_AREA;
            }
            return mapEntry->IsBattleGround() ? SPELL_CAST_OK : SPELL_FAILED_ONLY_BATTLEGROUNDS;
        }
    }

    return SPELL_CAST_OK;
}

void SpellMgr::LoadSkillLineAbilityMap()
{
    mSkillLineAbilityMap.clear();

    BarGoLink bar(sSkillLineAbilityStore.GetNumRows());
    uint32 count = 0;

    for (uint32 i = 0; i < sSkillLineAbilityStore.GetNumRows(); ++i)
    {
        bar.step();
        SkillLineAbilityEntry const* SkillInfo = sSkillLineAbilityStore.LookupEntry(i);
        if (!SkillInfo)
        {
            continue;
        }

        mSkillLineAbilityMap.insert(SkillLineAbilityMap::value_type(SkillInfo->spellId, SkillInfo));
        ++count;
    }

    sLog.outString(">> Loaded %u SkillLineAbility MultiMap Data", count);
    sLog.outString();
}

void SpellMgr::LoadSkillRaceClassInfoMap()
{
    mSkillRaceClassInfoMap.clear();

    BarGoLink bar(sSkillRaceClassInfoStore.GetNumRows());
    uint32 count = 0;

    for (uint32 i = 0; i < sSkillRaceClassInfoStore.GetNumRows(); ++i)
    {
        bar.step();
        SkillRaceClassInfoEntry const* skillRCInfo = sSkillRaceClassInfoStore.LookupEntry(i);
        if (!skillRCInfo)
        {
            continue;
        }

        // not all skills really listed in ability skills list
        if (!sSkillLineStore.LookupEntry(skillRCInfo->skillId))
        {
            continue;
        }

        mSkillRaceClassInfoMap.insert(SkillRaceClassInfoMap::value_type(skillRCInfo->skillId, skillRCInfo));

        ++count;
    }

    sLog.outString(">> Loaded %u SkillRaceClassInfo MultiMap Data", count);
    sLog.outString();
}

void SpellMgr::CheckUsedSpells(char const* table)
{
    uint32 countSpells = 0;
    uint32 countMasks = 0;

    //                                                 0       1               2               3         4           5             6          7          8         9    10
    QueryResult* result = WorldDatabase.PQuery("SELECT `spellid`,`SpellFamilyName`,`SpellFamilyMask`,`SpellIcon`,`SpellVisual`,`SpellCategory`,`EffectType`,`EffectAura`,`EffectIdx`,`Name`,`Code` FROM `%s`", table);

    if (!result)
    {
        BarGoLink bar(1);

        bar.step();

        sLog.outString();
        sLog.outErrorDb("`%s` table is empty!", table);
        return;
    }

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 spell       = fields[0].GetUInt32();
        int32  family      = fields[1].GetInt32();
        uint64 familyMask  = fields[2].GetUInt64();
        int32  spellIcon   = fields[3].GetInt32();
        int32  spellVisual = fields[4].GetInt32();
        int32  category    = fields[5].GetInt32();
        int32  effectType  = fields[6].GetInt32();
        int32  auraType    = fields[7].GetInt32();
        int32  effectIdx   = fields[8].GetInt32();
        std::string name   = fields[9].GetCppString();
        std::string code   = fields[10].GetCppString();

        // checks of correctness requirements itself

        if (family < -1 || family > SPELLFAMILY_POTION)
        {
            sLog.outError("Table '%s' for spell %u have wrong SpellFamily value(%u), skipped.", table, spell, family);
            continue;
        }

        // TODO: spellIcon check need dbc loading
        if (spellIcon < -1)
        {
            sLog.outError("Table '%s' for spell %u have wrong SpellIcon value(%u), skipped.", table, spell, spellIcon);
            continue;
        }

        // TODO: spellVisual check need dbc loading
        if (spellVisual < -1)
        {
            sLog.outError("Table '%s' for spell %u have wrong SpellVisual value(%u), skipped.", table, spell, spellVisual);
            continue;
        }

        // TODO: for spellCategory better check need dbc loading
        if (category < -1 || (category >= 0 && sSpellCategoryStore.find(category) == sSpellCategoryStore.end()))
        {
            sLog.outError("Table '%s' for spell %u have wrong SpellCategory value(%u), skipped.", table, spell, category);
            continue;
        }

        if (effectType < -1 || effectType >= TOTAL_SPELL_EFFECTS)
        {
            sLog.outError("Table '%s' for spell %u have wrong SpellEffect type value(%u), skipped.", table, spell, effectType);
            continue;
        }

        if (auraType < -1 || auraType >= TOTAL_AURAS)
        {
            sLog.outError("Table '%s' for spell %u have wrong SpellAura type value(%u), skipped.", table, spell, auraType);
            continue;
        }

        if (effectIdx < -1 || effectIdx >= 3)
        {
            sLog.outError("Table '%s' for spell %u have wrong EffectIdx value(%u), skipped.", table, spell, effectIdx);
            continue;
        }

        // now checks of requirements

        if (spell)
        {
            ++countSpells;

            SpellEntry const* spellEntry = sSpellStore.LookupEntry(spell);
            if (!spellEntry)
            {
                sLog.outError("Spell %u '%s' not exist but used in %s.", spell, name.c_str(), code.c_str());
                continue;
            }

            if (family >= 0 && spellEntry->SpellFamilyName != uint32(family))
            {
                sLog.outError("Spell %u '%s' family(%u) <> %u but used in %s.", spell, name.c_str(), spellEntry->SpellFamilyName, family, code.c_str());
                continue;
            }

            if (familyMask != UI64LIT(0xFFFFFFFFFFFFFFFF))
            {
                if (familyMask == UI64LIT(0x0000000000000000))
                {
                    if (spellEntry->SpellFamilyFlags)
                    {
                        sLog.outError("Spell %u '%s' not fit to (" UI64FMTD ") but used in %s.",
                                      spell, name.c_str(), familyMask, code.c_str());
                        continue;
                    }
                }
                else
                {
                    if (!spellEntry->IsFitToFamilyMask(familyMask))
                    {
                        sLog.outError("Spell %u '%s' not fit to (" I64FMT ") but used in %s.", spell, name.c_str(), familyMask, code.c_str());
                        continue;
                    }
                }
            }

            if (spellIcon >= 0 && spellEntry->SpellIconID != uint32(spellIcon))
            {
                sLog.outError("Spell %u '%s' icon(%u) <> %u but used in %s.", spell, name.c_str(), spellEntry->SpellIconID, spellIcon, code.c_str());
                continue;
            }

            if (spellVisual >= 0 && spellEntry->SpellVisual != uint32(spellVisual))
            {
                sLog.outError("Spell %u '%s' visual(%u) <> %u but used in %s.", spell, name.c_str(), spellEntry->SpellVisual, spellVisual, code.c_str());
                continue;
            }

            if (category >= 0 && spellEntry->Category != uint32(category))
            {
                sLog.outError("Spell %u '%s' category(%u) <> %u but used in %s.", spell, name.c_str(), spellEntry->Category, category, code.c_str());
                continue;
            }

            if (effectIdx >= EFFECT_INDEX_0)
            {
                if (effectType >= 0 && spellEntry->Effect[effectIdx] != uint32(effectType))
                {
                    sLog.outError("Spell %u '%s' effect%d <> %u but used in %s.", spell, name.c_str(), effectIdx + 1, effectType, code.c_str());
                    continue;
                }

                if (auraType >= 0 && spellEntry->EffectApplyAuraName[effectIdx] != uint32(auraType))
                {
                    sLog.outError("Spell %u '%s' aura%d <> %u but used in %s.", spell, name.c_str(), effectIdx + 1, auraType, code.c_str());
                    continue;
                }
            }
            else
            {
                if (effectType >= 0 && !spellEntry->HasSpellEffect(SpellEffects(effectType)))
                {
                    sLog.outError("Spell %u '%s' not have effect %u but used in %s.", spell, name.c_str(), effectType, code.c_str());
                    continue;
                }

                if (auraType >= 0 && !IsSpellHaveAura(spellEntry, AuraType(auraType)))
                {
                    sLog.outError("Spell %u '%s' not have aura %u but used in %s.", spell, name.c_str(), auraType, code.c_str());
                    continue;
                }
            }
        }
        else
        {
            ++countMasks;

            bool found = false;
            for (uint32 spellId = 1; spellId < sSpellStore.GetNumRows(); ++spellId)
            {
                SpellEntry const* spellEntry = sSpellStore.LookupEntry(spellId);
                if (!spellEntry)
                {
                    continue;
                }

                if (family >= 0 && spellEntry->SpellFamilyName != uint32(family))
                {
                    continue;
                }

                if (familyMask != UI64LIT(0xFFFFFFFFFFFFFFFF))
                {
                    if (familyMask == UI64LIT(0x0000000000000000))
                    {
                        if (spellEntry->SpellFamilyFlags)
                        {
                            continue;
                        }
                    }
                    else
                    {
                        if (!spellEntry->IsFitToFamilyMask(familyMask))
                        {
                            continue;
                        }
                    }
                }

                if (spellIcon >= 0 && spellEntry->SpellIconID != uint32(spellIcon))
                {
                    continue;
                }

                if (spellVisual >= 0 && spellEntry->SpellVisual != uint32(spellVisual))
                {
                    continue;
                }

                if (category >= 0 && spellEntry->Category != uint32(category))
                {
                    continue;
                }

                if (effectIdx >= 0)
                {
                    if (effectType >= 0 && spellEntry->Effect[effectIdx] != uint32(effectType))
                    {
                        continue;
                    }

                    if (auraType >= 0 && spellEntry->EffectApplyAuraName[effectIdx] != uint32(auraType))
                    {
                        continue;
                    }
                }
                else
                {
                    if (effectType >= 0 && !spellEntry->HasSpellEffect(SpellEffects(effectType)))
                    {
                        continue;
                    }

                    if (auraType >= 0 && !IsSpellHaveAura(spellEntry, AuraType(auraType)))
                    {
                        continue;
                    }
                }

                found = true;
                break;
            }

            if (!found)
            {
                if (effectIdx >= 0)
                    sLog.outError("Spells '%s' not found for family %i (" I64FMT ") icon(%i) visual(%i) category(%i) effect%d(%i) aura%d(%i) but used in %s",
                                  name.c_str(), family, familyMask, spellIcon, spellVisual, category, effectIdx + 1, effectType, effectIdx + 1, auraType, code.c_str());
                else
                    sLog.outError("Spells '%s' not found for family %i (" I64FMT ") icon(%i) visual(%i) category(%i) effect(%i) aura(%i) but used in %s",
                                  name.c_str(), family, familyMask, spellIcon, spellVisual, category, effectType, auraType, code.c_str());
                continue;
            }
        }
    }
    while (result->NextRow());

    delete result;

    sLog.outString();
    sLog.outString(">> Checked %u spells and %u spell masks", countSpells, countMasks);
}

DiminishingGroup GetDiminishingReturnsGroupForSpell(SpellEntry const* spellproto, bool triggered)
{
    // Explicit Diminishing Groups
    switch (spellproto->SpellFamilyName)
    {
        case SPELLFAMILY_ROGUE:
        {
            // Kidney Shot
            if (spellproto->IsFitToFamilyMask(UI64LIT(0x00000200000)))
            {
                return DIMINISHING_KIDNEYSHOT;
            }
            // Blind
            else if (spellproto->IsFitToFamilyMask(UI64LIT(0x00001000000)))
            {
                return DIMINISHING_BLIND;
            }
            break;
        }
        case SPELLFAMILY_HUNTER:
        {
            // Freezing Trap
            if (spellproto->IsFitToFamilyMask(UI64LIT(0x00000000008)))
            {
                return DIMINISHING_FREEZE;
            }
            break;
        }
        case SPELLFAMILY_WARLOCK:
        {
            // Fear
            if (spellproto->IsFitToFamilyMask(UI64LIT(0x0000000080000000)) && spellproto->Mechanic == MECHANIC_FEAR)
            {
                return DIMINISHING_WARLOCK_FEAR;
            }
            // Curses/etc
            if (spellproto->IsFitToFamilyMask(UI64LIT(0x0000000080000000)))
            {
                return DIMINISHING_LIMITONLY;
            }
            break;
        }
        case SPELLFAMILY_WARRIOR:
        {
            // Hamstring - limit duration to 10s in PvP
            if (spellproto->IsFitToFamilyMask(UI64LIT(0x00000000002)))
            {
                return DIMINISHING_LIMITONLY;
            }
            break;
        }
        default:
            break;
    }

    // Get by mechanic
    uint32 mechanic = GetAllSpellMechanicMask(spellproto);
    if (!mechanic)
    {
        return DIMINISHING_NONE;
    }

    if (mechanic & (1 << (MECHANIC_STUN - 1)))
    {
        return triggered ? DIMINISHING_TRIGGER_STUN : DIMINISHING_CONTROL_STUN;
    }
    if (mechanic & (1 << (MECHANIC_SLEEP - 1)))
    {
        return DIMINISHING_SLEEP;
    }
    if (mechanic & (1 << (MECHANIC_POLYMORPH - 1)))
    {
        return DIMINISHING_POLYMORPH;
    }
    if (mechanic & (1 << (MECHANIC_ROOT - 1)))
    {
        return triggered ? DIMINISHING_TRIGGER_ROOT : DIMINISHING_CONTROL_ROOT;
    }
    if (mechanic & (1 << (MECHANIC_FEAR - 1)))
    {
        return DIMINISHING_FEAR;
    }
    if (mechanic & (1 << (MECHANIC_CHARM - 1)))
    {
        return DIMINISHING_CHARM;
    }
    if (mechanic & (1 << (MECHANIC_SILENCE - 1)))
    {
        return DIMINISHING_SILENCE;
    }
    if (mechanic & (1 << (MECHANIC_DISARM - 1)))
    {
        return DIMINISHING_DISARM;
    }
    if (mechanic & (1 << (MECHANIC_FREEZE - 1)))
    {
        return DIMINISHING_FREEZE;
    }
    if (mechanic & ((1 << (MECHANIC_KNOCKOUT - 1)) | (1 << (MECHANIC_SAPPED - 1))))
    {
        return DIMINISHING_KNOCKOUT;
    }
    if (mechanic & (1 << (MECHANIC_BANISH - 1)))
    {
        return DIMINISHING_BANISH;
    }
    if (mechanic & (1 << (MECHANIC_HORROR - 1)))
    {
        return DIMINISHING_DEATHCOIL;
    }

    return DIMINISHING_NONE;
}

bool IsDiminishingReturnsGroupDurationLimited(DiminishingGroup group)
{
    switch (group)
    {
        case DIMINISHING_CONTROL_STUN:
        case DIMINISHING_TRIGGER_STUN:
        case DIMINISHING_KIDNEYSHOT:
        case DIMINISHING_SLEEP:
        case DIMINISHING_CONTROL_ROOT:
        case DIMINISHING_TRIGGER_ROOT:
        case DIMINISHING_FEAR:
        case DIMINISHING_WARLOCK_FEAR:
        case DIMINISHING_CHARM:
        case DIMINISHING_POLYMORPH:
        case DIMINISHING_FREEZE:
        case DIMINISHING_KNOCKOUT:
        case DIMINISHING_BLIND:
        case DIMINISHING_BANISH:
        case DIMINISHING_LIMITONLY:
            return true;
        default:
            return false;
    }
}

DiminishingReturnsType GetDiminishingReturnsGroupType(DiminishingGroup group)
{
    switch (group)
    {
        case DIMINISHING_BLIND:
        case DIMINISHING_CONTROL_STUN:
        case DIMINISHING_TRIGGER_STUN:
        case DIMINISHING_KIDNEYSHOT:
            return DRTYPE_ALL;
        case DIMINISHING_SLEEP:
        case DIMINISHING_CONTROL_ROOT:
        case DIMINISHING_TRIGGER_ROOT:
        case DIMINISHING_FEAR:
        case DIMINISHING_CHARM:
        case DIMINISHING_POLYMORPH:
        case DIMINISHING_SILENCE:
        case DIMINISHING_DISARM:
        case DIMINISHING_DEATHCOIL:
        case DIMINISHING_FREEZE:
        case DIMINISHING_BANISH:
        case DIMINISHING_WARLOCK_FEAR:
        case DIMINISHING_KNOCKOUT:
            return DRTYPE_PLAYER;
        default:
            break;
    }

    return DRTYPE_NONE;
}

bool SpellArea::IsFitToRequirements(Player const* player, uint32 newZone, uint32 newArea) const
{
    if (areaId)
    {
        // not in expected zone
        if (newZone != areaId && newArea != areaId)
        {
            return false;
        }
    }

    if (!player)    //all following checks require valid player
    {
        return false;
    }

    if (conditionId)
    {
        if (!sObjectMgr.IsPlayerMeetToCondition(conditionId, player, player->GetMap(), NULL, CONDITION_FROM_SPELL_AREA))
        {
            return false;
        }
    }
    else                                                    // This block will be removed
    {
        if (gender != GENDER_NONE)
        {
            // not in expected gender
            if (gender != player->getGender())
            {
                return false;
            }
        }

        if (raceMask)
        {
            // not in expected race
            if (!(raceMask & player->getRaceMask()))
            {
                return false;
            }
        }

        if (questStart)
        {
            // not in expected required quest state
            if ((!questStartCanActive || !player->IsActiveQuest(questStart)) && !player->GetQuestRewardStatus(questStart))
            {
                return false;
            }
        }

        if (questEnd)
        {
            // not in expected forbidden quest state
            if (player->GetQuestRewardStatus(questEnd))
            {
                return false;
            }
        }
    }

    if (auraSpell)
    {
        // not have expected aura
        if (auraSpell > 0)
            // have expected aura
        {
            return player->HasAura(auraSpell);
        }
        else
            // not have expected aura
        {
            return !player->HasAura(-auraSpell);
        }
    }

    return true;
}

void SpellArea::ApplyOrRemoveSpellIfCan(Player* player, uint32 newZone, uint32 newArea, bool onlyApply) const
{
    MANGOS_ASSERT(player);

    if (IsFitToRequirements(player, newZone, newArea))
    {
        if (autocast && !player->HasAura(spellId))
        {
            player->CastSpell(player, spellId, true);
        }
    }
    else if (!onlyApply && player->HasAura(spellId))
    {
        player->RemoveAurasDueToSpell(spellId);
    }
}

void SpellMgr::LoadSpellAffects()
{
    mSpellAffectMap.clear();                                // need for reload case

    uint32 count = 0;

    //                                                0      1         2
    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `effectId`, `SpellFamilyMask` FROM `spell_affect`");
    if (!result)
    {
        BarGoLink bar(1);

        bar.step();

        sLog.outString();
        sLog.outString(">> Loaded %u spell affect definitions", count);
        return;
    }

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 entry = fields[0].GetUInt32();
        uint8 effectId = fields[1].GetUInt8();

        SpellEntry const* spellInfo = sSpellStore.LookupEntry(entry);

        if (!spellInfo)
        {
            sLog.outErrorDb("Spell %u listed in `spell_affect` does not exist", entry);
            continue;
        }

        if (effectId >= MAX_EFFECT_INDEX)
        {
            sLog.outErrorDb("Spell %u listed in `spell_affect` have invalid effect index (%u)", entry, effectId);
            continue;
        }

        if (spellInfo->Effect[effectId] != SPELL_EFFECT_APPLY_AURA || (
                spellInfo->EffectApplyAuraName[effectId] != SPELL_AURA_ADD_FLAT_MODIFIER &&
                spellInfo->EffectApplyAuraName[effectId] != SPELL_AURA_ADD_PCT_MODIFIER  &&
                spellInfo->EffectApplyAuraName[effectId] != SPELL_AURA_ADD_TARGET_TRIGGER &&
                spellInfo->EffectApplyAuraName[effectId] != SPELL_AURA_OVERRIDE_CLASS_SCRIPTS))
        {
            sLog.outErrorDb("Spell %u listed in `spell_affect` have not SPELL_AURA_ADD_FLAT_MODIFIER (%u) or SPELL_AURA_ADD_PCT_MODIFIER (%u) or SPELL_AURA_ADD_TARGET_TRIGGER (%u) or SPELL_AURA_OVERRIDE_CLASS_SCRIPTS (%u) for effect index (%u)", entry, SPELL_AURA_ADD_FLAT_MODIFIER, SPELL_AURA_ADD_PCT_MODIFIER, SPELL_AURA_ADD_TARGET_TRIGGER, SPELL_AURA_OVERRIDE_CLASS_SCRIPTS, effectId);
            continue;
        }

        uint64 spellAffectMask = fields[2].GetUInt64();

        // Spell.dbc have own data for low part of SpellFamilyMask
        if (spellInfo->EffectItemType[effectId])
        {
            if (static_cast<uint64>(spellInfo->EffectItemType[effectId]) == spellAffectMask)
            {
                sLog.outErrorDb("Spell %u listed in `spell_affect` have redundant (same with EffectItemType%d) data for effect index (%u) and not needed, skipped.", entry, effectId + 1, effectId);
                continue;
            }
        }

        mSpellAffectMap.insert(SpellAffectMap::value_type((entry << 8) + effectId, spellAffectMask));

        ++count;
    }
    while (result->NextRow());

    delete result;

    sLog.outString();
    sLog.outString(">> Loaded %u spell affect definitions", count);

    for (uint32 id = 0; id < sSpellStore.GetNumRows(); ++id)
    {
        SpellEntry const* spellInfo = sSpellStore.LookupEntry(id);
        if (!spellInfo)
        {
            continue;
        }

        for (int effectId = 0; effectId < MAX_EFFECT_INDEX; ++effectId)
        {
            if (spellInfo->Effect[effectId] != SPELL_EFFECT_APPLY_AURA || (
                    spellInfo->EffectApplyAuraName[effectId] != SPELL_AURA_ADD_FLAT_MODIFIER &&
                    spellInfo->EffectApplyAuraName[effectId] != SPELL_AURA_ADD_PCT_MODIFIER  &&
                    spellInfo->EffectApplyAuraName[effectId] != SPELL_AURA_ADD_TARGET_TRIGGER))
                    {
                        continue;
                    }

            if (spellInfo->EffectItemType[effectId] != 0)
            {
                continue;
            }

            if (mSpellAffectMap.find((id << 8) + effectId) !=  mSpellAffectMap.end())
            {
                continue;
            }

            sLog.outErrorDb("Spell %u (%s) misses spell_affect for effect %u", id, spellInfo->SpellName[sWorld.GetDefaultDbcLocale()], effectId);
        }
    }
}

void SpellMgr::LoadFacingCasterFlags()
{
    mSpellFacingFlagMap.clear();
    uint32 count = 0;

    //                                                0              1
    QueryResult* result = WorldDatabase.Query("SELECT `entry`, `facingcasterflag` FROM `spell_facing`");
    if (!result)
    {
        BarGoLink bar(1);
        bar.step();
        sLog.outString();
        sLog.outString(">> Loaded %u facing caster flags", count);
        return;
    }

    BarGoLink bar(result->GetRowCount());

    do
    {
        Field* fields = result->Fetch();

        bar.step();

        uint32 entry              = fields[0].GetUInt32();
        uint32 FacingCasterFlags  = fields[1].GetUInt32();

        SpellEntry const* spellInfo = sSpellStore.LookupEntry(entry);
        if (!spellInfo)
        {
            sLog.outErrorDb("Spell %u listed in `spell_facing` does not exist", entry);
            continue;
        }
        mSpellFacingFlagMap[entry]    = FacingCasterFlags;

        ++count;
    }
    while (result->NextRow());

    delete result;

    sLog.outString();
    sLog.outString(">> Loaded %u facing caster flags", count);
}
